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13149-00-3

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13149-00-3 Usage

Chemical Properties

white to almost white cryst. low melting solid

Uses

(3aR,7aS)-rel-Hexahydro-1,3-isobenzofurandione is a reagent used in the synthesis of Pregabalin (P704800), a GABA analogue used as an anticonvulsant. Also used to prepare P2X7 receptor antagonists.

Purification Methods

It has been obtained by heating the trans-acid or anhydride at 200o. Crystallise it from *C6H6/Et2O or distil it. [Kohler & Jansen J Am Chem Soc 60 2145 1938, Abell J Org Chem 22 769 1957, Beilstein 17 II 452, 17 III/IV 5931.]

Check Digit Verification of cas no

The CAS Registry Mumber 13149-00-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,1,4 and 9 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 13149-00:
(7*1)+(6*3)+(5*1)+(4*4)+(3*9)+(2*0)+(1*0)=73
73 % 10 = 3
So 13149-00-3 is a valid CAS Registry Number.
InChI:InChI=1/C8H10O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h5-6H,1-4H2/t5-,6+

13149-00-3 Well-known Company Product Price

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  • Alfa Aesar

  • (A16053)  cis-1,2-Cyclohexanedicarboxylic anhydride, 98%   

  • 13149-00-3

  • 50g

  • 100.0CNY

  • Detail
  • Alfa Aesar

  • (A16053)  cis-1,2-Cyclohexanedicarboxylic anhydride, 98%   

  • 13149-00-3

  • 250g

  • 150.0CNY

  • Detail
  • Alfa Aesar

  • (A16053)  cis-1,2-Cyclohexanedicarboxylic anhydride, 98%   

  • 13149-00-3

  • 500g

  • 219.0CNY

  • Detail

13149-00-3SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017

1.Identification

1.1 GHS Product identifier

Product name Cis-1,2-Cyclohexanedicarboxylic Anhydride

1.2 Other means of identification

Product number -
Other names cis-Hexahydroisobenzofuran-1,3-dione

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:13149-00-3 SDS

13149-00-3Synthetic route

cis-1,2,3,6-tetrahydrophthalic anhydride
935-79-5

cis-1,2,3,6-tetrahydrophthalic anhydride

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

Conditions
ConditionsYield
With hydrogen; palladium on activated charcoal In 1,4-dioxane for 24h;96%
With acetic acid; platinum Hydrogenation;
With ethyl acetate; platinum Hydrogenation;
With silica gel; nickel at 130℃; Hydrogenation;
With nickel; ethyl acetate Hydrogenation;
(1R,2S)-cyclohexane-1,2-dicarboxylic acid
610-09-3

(1R,2S)-cyclohexane-1,2-dicarboxylic acid

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

Conditions
ConditionsYield
With Isopropenyl acetate; Montmorillonite KSF for 0.0666667h; Irradiation;94%
With Isopropenyl acetate; Montmorillonite KSF for 0.0666667h; Product distribution; Irradiation; var. microwave lenghts, var. reaction time, other carboxylic diacids;94%
With 4-methyl-morpholine; methyl chloroformate In tetrahydrofuran at 20℃; for 0.25h;
With 2,6-bis[(2,2,6,6-tetramethylpiperidin-1-yl)methyl]phenylboronic acid In propiononitrile99 %Spectr.
(1R,2S)-cyclohexane-1,2-dicarboxylic acid
610-09-3

(1R,2S)-cyclohexane-1,2-dicarboxylic acid

trans-1,2-cyclohexanedicarboxylic acid
2305-32-0

trans-1,2-cyclohexanedicarboxylic acid

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

Conditions
ConditionsYield
With acetyl chloride
(+/-)-trans-1,2-cyclohexanedicarboxylic anhydride
14166-21-3

(+/-)-trans-1,2-cyclohexanedicarboxylic anhydride

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

Conditions
ConditionsYield
at 200℃;
trans-1,2-cyclohexanedicarboxylic acid
2305-32-0

trans-1,2-cyclohexanedicarboxylic acid

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

Conditions
ConditionsYield
With trifluoroacetic anhydride
(1R,2R)-(-)-trans-cyclohexane-1,2-dicarboxylic acid
46022-05-3

(1R,2R)-(-)-trans-cyclohexane-1,2-dicarboxylic acid

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

Conditions
ConditionsYield
With 2,6-bis[(2,2,6,6-tetramethylpiperidin-1-yl)methyl]phenylboronic acid In propiononitrile stereoselective reaction;89 %Spectr.
1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

hexahydro-isobenzo[c]furan-1-one
6939-71-5

hexahydro-isobenzo[c]furan-1-one

Conditions
ConditionsYield
With sodium tetrahydroborate In tetrahydrofuran at 0℃; for 2h; Inert atmosphere;100%
With sodium tetrahydroborate In tetrahydrofuran at 0 - 20℃; for 5h;91%
With sodium tetrahydroborate In tetrahydrofuran at 0℃; for 2h;85%
methanol
67-56-1

methanol

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

dimethyl cis-1,2-cyclohexanedicarboxylate
1687-29-2

dimethyl cis-1,2-cyclohexanedicarboxylate

Conditions
ConditionsYield
With sulfuric acid at 20 - 60℃;100%
With sulfuric acid
With thionyl chloride for 4h; Inert atmosphere; Reflux;
methanol
67-56-1

methanol

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

(1S,2R)-2-(methoxycarbonyl)cyclohexanecarboxylic acid
88335-92-6

(1S,2R)-2-(methoxycarbonyl)cyclohexanecarboxylic acid

Conditions
ConditionsYield
at 100℃; for 1h;100%
With polymer-supported Cinchona-based sulfonamide In mBTE at 20℃; for 3h; optical yield given as %ee; enantioselective reaction;99%
Stage #1: methanol; 1,2-cis-cyclohexanedicarboxylic anhydride; C28H31N3O3S In di-isopropyl ether at -20℃; for 4h;
Stage #2: With hydrogenchloride In di-isopropyl ether; water Product distribution / selectivity;
99%
1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

cis-1-carboxy-2-(aminocarboxyl)-2-cyclohexane
6294-84-4, 92116-89-7, 92116-90-0

cis-1-carboxy-2-(aminocarboxyl)-2-cyclohexane

Conditions
ConditionsYield
With ammonium hydroxide at 25℃;100%
With ammonium hydroxide88%
With ammonia In water
With ammonium hydroxide
cyclohexylamine
108-91-8

cyclohexylamine

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

2-cyclohexylcarbamoyl-cyclohexanecarboxylic acid

2-cyclohexylcarbamoyl-cyclohexanecarboxylic acid

Conditions
ConditionsYield
Stage #1: cyclohexylamine; 1,2-cis-cyclohexanedicarboxylic anhydride In N,N-dimethyl acetamide at 20℃; for 24h;
Stage #2: In N,N-dimethyl acetamide; xylene at 140℃; for 48h;
100%
tert-butylamine
75-64-9

tert-butylamine

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

2-tert-butylcarbamoyl-cyclohexanecarboxylic acid

2-tert-butylcarbamoyl-cyclohexanecarboxylic acid

Conditions
ConditionsYield
Stage #1: tert-butylamine; 1,2-cis-cyclohexanedicarboxylic anhydride In N,N-dimethyl acetamide at 20℃; for 24h;
Stage #2: In N,N-dimethyl acetamide; xylene at 140℃; for 48h;
100%
methanol
67-56-1

methanol

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

Conditions
ConditionsYield
at 100℃; for 1h;100%
With 1,4-diaza-bicyclo[2.2.2]octane
With magnetite nanoparticles In tert-butyl methyl ether at 20℃; for 18h; Inert atmosphere;
Reflux;
Heating;
methanol
67-56-1

methanol

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

cyclohexane-1,2-dicarboxylic acid monomethyl ester
88335-91-5

cyclohexane-1,2-dicarboxylic acid monomethyl ester

Conditions
ConditionsYield
With 1-((1R,2R)-2-(dimethylamino)cyclohexyl)-3-phenylthiourea In diethyl ether at 20℃; for 24h; Inert atmosphere; optical yield given as %ee; enantioselective reaction;99%
With tert-butyl methyl ether; C28H29N3O3S at 20℃; for 24h; enantioselective reaction;99%
With 1,4-bis(dihydroquinidinyl)anthraquinone In diethyl ether at -20℃; for 48h;97%
aniline
62-53-3

aniline

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

A

N-phenyltetrahydrophthalimide
26491-47-4

N-phenyltetrahydrophthalimide

B

2-Phenylcarbamoyl-cyclohexanecarboxylic acid

2-Phenylcarbamoyl-cyclohexanecarboxylic acid

Conditions
ConditionsYield
Stage #1: aniline; 1,2-cis-cyclohexanedicarboxylic anhydride In N,N-dimethyl acetamide at 20℃; for 24h;
Stage #2: In N,N-dimethyl acetamide; xylene at 140℃; for 48h;
A 97%
B n/a
diethylzinc
557-20-0

diethylzinc

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

(1RS,2SR)-2-propionylcyclohexanecarboxylic acid

(1RS,2SR)-2-propionylcyclohexanecarboxylic acid

Conditions
ConditionsYield
With [2,2]bipyridinyl; bis(acetylacetonate)nickel(II); trifluorotoluene In tetrahydrofuran; hexane at 0 - 20℃; for 48h;96%
With [2,2]bipyridinyl; bis(1,5-cyclooctadiene)nickel (0); 1-trifluoromethyl-4-vinyl-benzene In tetrahydrofuran at 0 - 23℃; for 12h; Product distribution; Further Variations:; Reagents;92%
(R)-2-amino-3-methylbutanol
4276-09-9

(R)-2-amino-3-methylbutanol

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

cis-(2'S)-(+)-N-<1-(1-methylethyl)-2-hydroxyethyl>-3a,4,5,6,7,7a-hexahydro-1H-isoindolimide
122383-33-9

cis-(2'S)-(+)-N-<1-(1-methylethyl)-2-hydroxyethyl>-3a,4,5,6,7,7a-hexahydro-1H-isoindolimide

Conditions
ConditionsYield
at 220℃; for 2.5h;95%
1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

benzyl alcohol
100-51-6

benzyl alcohol

(1R,2S)-cis-2-benzyloxycarbonyl-cyclohexane-1-carboxylic acid
151434-99-0

(1R,2S)-cis-2-benzyloxycarbonyl-cyclohexane-1-carboxylic acid

Conditions
ConditionsYield
With quinindine In toluene at -55℃; for 96h; Inert atmosphere; enantioselective reaction;95%
tributylphosphine In [D3]acetonitrile for 24h;70%
With quinindine In toluene at -50℃; for 120h; Inert atmosphere;60%
2-cyanoethylamine
151-18-8

2-cyanoethylamine

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

3-(1,3-dioxo-octahydroisoindol-2-yl)propionitrile
192824-58-1, 260435-04-9

3-(1,3-dioxo-octahydroisoindol-2-yl)propionitrile

Conditions
ConditionsYield
at 200℃; for 0.5h;95%
3-methylantranilic acid
4389-45-1

3-methylantranilic acid

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

C16H17NO4
1185155-84-3

C16H17NO4

Conditions
ConditionsYield
at 110℃; for 10h; Inert atmosphere; neat (no solvent);95%
1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

(3aR,7aS)-2-hydroxyhexahydro-1H-isoindol-1,3(2H)-dione
18886-85-6

(3aR,7aS)-2-hydroxyhexahydro-1H-isoindol-1,3(2H)-dione

Conditions
ConditionsYield
With hydroxyammonium sulfate; sodium hydroxide In water at 90℃; for 1.25h;94%
With hydroxylamine sulfate; sodium hydroxide In water at 90℃; for 2.25h;94%
With hydroxyammonium sulfate; sodium hydroxide In water at 90℃; for 2.25h;94%
With methanol; hydroxylamine
With water; hydroxylamine
1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

cis-1,2-cyclohexanedimethanol
15753-50-1

cis-1,2-cyclohexanedimethanol

Conditions
ConditionsYield
With lithium aluminium tetrahydride In tetrahydrofuran at 0℃; for 2h; Inert atmosphere; Reflux;94%
With lithium aluminium tetrahydride In tetrahydrofuran for 24h; Heating;89.4%
With lithium aluminium tetrahydride In tetrahydrofuran for 3h; Reduction; Heating;88%
methylamine hydrochloride
593-51-1

methylamine hydrochloride

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

2-methylhexahydro-1H-isoindole-1,3(2H)-dione
83248-53-7

2-methylhexahydro-1H-isoindole-1,3(2H)-dione

Conditions
ConditionsYield
With sodium acetate In acetic acid for 24h; Heating;94%
(S)-1-phenyl-3,3-bis(trifluoromethyl)propan-1,3-diol
141329-76-2

(S)-1-phenyl-3,3-bis(trifluoromethyl)propan-1,3-diol

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

(1R,2S)-Cyclohexane-1,2-dicarboxylic acid mono-((S)-4,4,4-trifluoro-3-hydroxy-1-phenyl-3-trifluoromethyl-butyl) ester
141329-77-3

(1R,2S)-Cyclohexane-1,2-dicarboxylic acid mono-((S)-4,4,4-trifluoro-3-hydroxy-1-phenyl-3-trifluoromethyl-butyl) ester

Conditions
ConditionsYield
With sodium hydride In toluene at -78℃; for 1h; Product distribution; other ς-symmetric cyclic dicarboxylic acid anhydride and glutaric anhydrides, other reagents; var. reaction conditions;94%
1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

(1S,6R)-8-oxabicyclo[4.3.0]nonan-7-one
65376-02-5

(1S,6R)-8-oxabicyclo[4.3.0]nonan-7-one

Conditions
ConditionsYield
With bis(1,5-cyclooctadiene)diiridium(I) dichloride; C77H108O6P2 In ethyl acetate at 80℃; for 20h; Inert atmosphere; Glovebox; enantioselective reaction;94%
Multi-step reaction with 3 steps
1.1: toluene / 1 h / 20 °C
2.1: ZnCl2; HMDS / toluene / 2 h / Heating
3.1: chiral 2-methyl-1-oxa-3-aza-2-boracyclopenta[a]indene; BH3*THF / tetrahydrofuran / 18 h / 25 °C
3.2: NaBH4 / ethanol / 4 h / 50 °C
3.3: aq. H2SO4 / 2 h / 80 °C
View Scheme
4-chlorophenyl trifluoromethanesulfonate
29540-84-9

4-chlorophenyl trifluoromethanesulfonate

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

cis-2-(4-chlorobenzoyl)cyclohexane-1-carboxylic acid
52240-18-3, 52240-19-4

cis-2-(4-chlorobenzoyl)cyclohexane-1-carboxylic acid

Conditions
ConditionsYield
With [2,2]bipyridinyl; bis(1,5-cyclooctadiene)nickel (0); chloro-trimethyl-silane; zinc(II) iodide; zinc In N,N-dimethyl acetamide at 80℃; for 12h; Inert atmosphere; Sealed tube;94%
methylamine
74-89-5

methylamine

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

(S)-trans-N-methylcyclohexane-1,2-dicarboximide
117307-10-5

(S)-trans-N-methylcyclohexane-1,2-dicarboximide

Conditions
ConditionsYield
With acetyl chloride In ethanol for 0.166667h; Inert atmosphere; Reflux;93%
benzylamine
100-46-9

benzylamine

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

2-benzylhexahydro-1H-isoindole-1,3(2H)-dione
66050-00-8

2-benzylhexahydro-1H-isoindole-1,3(2H)-dione

Conditions
ConditionsYield
at 200℃; for 0.5h;92%
Stage #1: benzylamine; 1,2-cis-cyclohexanedicarboxylic anhydride In toluene at 20℃; for 1h; Inert atmosphere;
Stage #2: With 1,1,1,3,3,3-hexamethyl-disilazane; zinc(II) chloride In toluene for 2h; Inert atmosphere; Reflux;
74%
2-amino-2-hydroxymethyl-1,3-propanediol
77-86-1

2-amino-2-hydroxymethyl-1,3-propanediol

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

polymer; monomer(s): cis-1,2-cyclohexanedicarboxylic anhydride; tris(hydroxymethyl)aminomethane

polymer; monomer(s): cis-1,2-cyclohexanedicarboxylic anhydride; tris(hydroxymethyl)aminomethane

Conditions
ConditionsYield
at 110℃; for 5h;92%
toluene
108-88-3

toluene

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

cis-2-(4-methylbenzoyl)cyclohexane-1-carboxylic acid

cis-2-(4-methylbenzoyl)cyclohexane-1-carboxylic acid

Conditions
ConditionsYield
With aluminium trichloride91.8%
With aluminium trichloride
1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

benzene
71-43-2

benzene

(1S*,2R*)-2-benzoylcyclohexane-1-carboxylic acid
86528-42-9

(1S*,2R*)-2-benzoylcyclohexane-1-carboxylic acid

Conditions
ConditionsYield
With aluminium trichloride91%
With aluminium trichloride In dichloromethane Friedel-Crafts acylation; Heating;20%
4,4'-diamino-4''-cyanotriphenylamine

4,4'-diamino-4''-cyanotriphenylamine

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

4,4'-di(1,2-cyclohexanedicarboxyimido)-4''-cyanotriphenylamine
1416570-70-1

4,4'-di(1,2-cyclohexanedicarboxyimido)-4''-cyanotriphenylamine

Conditions
ConditionsYield
With acetic acid at 140℃; for 3h;91%
diphenyl boric ester of (R)-2-methoxy-1-phenylethanol
109459-38-3

diphenyl boric ester of (R)-2-methoxy-1-phenylethanol

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

Cyclohexane-1,2-dicarboxylic acid mono-((R)-2-methoxy-1-phenyl-ethyl) ester

Cyclohexane-1,2-dicarboxylic acid mono-((R)-2-methoxy-1-phenyl-ethyl) ester

Conditions
ConditionsYield
With diphenylboryl triflate In toluene at 0℃; for 61h;90%
aniline
62-53-3

aniline

1,2-cis-cyclohexanedicarboxylic anhydride
13149-00-3

1,2-cis-cyclohexanedicarboxylic anhydride

cis-2-phenyl-octahydroisoindole-1,3-dione
92670-99-0

cis-2-phenyl-octahydroisoindole-1,3-dione

Conditions
ConditionsYield
Stage #1: aniline; 1,2-cis-cyclohexanedicarboxylic anhydride In tetrahydrofuran at 40℃; for 0.5h; Inert atmosphere;
Stage #2: at 190℃; for 4h; Inert atmosphere;
90%
Stage #1: aniline; 1,2-cis-cyclohexanedicarboxylic anhydride In tetrahydrofuran at 40℃; for 0.5h; Inert atmosphere;
Stage #2: at 190℃; for 4h; Inert atmosphere;
86%
at 200℃; for 2h;36%

13149-00-3Relevant articles and documents

Enzymatische Synthesen chiraler Bausteine aus prochiralen meso-Substraten: Herstellung von Methyl(hydrogen)-1,2-cycloalkandicarboxylaten

Schneider, Manfred,Engel, Norbert,Hoenicke, Petra,Heinemann, Gerd,Goerisch, Helmut

, p. 55 - 56 (1984)

-

RECYCLABLE POLYMERS BASED ON RING-FUSED GAMMA-BUTYROLACTONES

-

Page/Page column 34; 39, (2020/02/23)

The invention discloses a class of new polymers, trans-ring-fused poly(4-hydroxybutyrate)s (RF-P4HB) that exhibit a unique set of properties, including robust thermal stability and mechanical strength, quantitative recyclability to the building block monomers via thermolysis and/or chemical catalysis, and convenient production from the chemical ring-opening polymerization under ambient temperature and pressure. Another unique property is the formation of crystalline stereocomplexed polymers with high melting temperature upon mixing the two enantiomeric RF-P4HB chains via stereocomplexing co-crystallization. This invention also provides the corresponding ring-fused lactone monomer structures that enable the synthesis of the RF-P4HB polymers, through trans-fusing of rings to the parent γ-butyrolactone ring. Furthermore, a polymerization or copolymerization process for the synthesis of RF-P4HB polymers and copolymers is disclosed.

NOVEL HEPATITIS C VIRUS INHIBITORS

-

Page/Page column 43, (2013/07/05)

The invention provides compounds of formula (I): wherein Rings A and A' are independently 5-membered optionally substituted aromatic heterocycles; Q is C(=O)NR1R1' or formula U is C(R4)2, O, S, S(=O)2, C(R4)2C(R4)2, CH2O, OCH2, CH2S, SCH2, CH2S(=O)2, S(=O)CH2 or C=C(Ru )2; X is CH2, CHR12, CR12R12, O, S, S(=O)2 or NRx; m is 0, 1, 2 or 3; n is 0, 1, 2 or 3; the other variables are as defined in the claims, which are of use in the treatment or prophylaxis of hepatitis C virus infection, and related aspects.

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