129829-60-3

Upstream product

• 129745-63-7 (-)-1D-2,3,4-tris-O-<(tert-butyl)dimethylsilyl>cyclohex-2-ene-1,2,4/3-tetrol 
• 108-24-7 acetic anhydride 
• 184377-26-2 (1SR,2RS,4RS,5SR)-4,5-bis(tert-butyldimethylsilyloxy)cyclohexene oxide 
• 255912-66-4 (1R,4S,5R)-4,5-bis(tert-butyldimethylsilyloxy)cyclohex-2-en-1-ol 
• 184377-29-5 (4S,5R)-4,5-bis(tert-butyldimethylsilyloxy)cyclohex-2-enone 
• 129829-53-4 (+)-(1R,4R,5R,6R)-2,2-bis(benzyloxy)-5,6-exo-epoxy-7-oxabicyclo<2.2.1>heptane 
• 129829-55-6 (-)-(1R,4R,5R,6R)-5-exo,6-endo-bis(<(tert-butyl)dimethylsilyl>oxy)-7-oxabicyclo<2.2.1>heptan-2-one 
• 31077-18-6 1,2,3,4,5,-penta-O-acetyl-6-bromo-6-deoxy-scyllo-inositol 
• 55990-84-6 Acetic acid (1R,2S,5R,6S)-5-acetoxy-7-oxa-bicyclo[4.1.0]hept-3-en-2-yl ester 
• 64-19-7 acetic acid 
• 69945-44-4 (1RS,2SR,3RS,4RS)-2,3-dibromocyclohex-5-ene-1,4-diol 
• 87-89-8 D-myo-inositol 
• 17793-95-2 (1RS,2RS)-cyclohexa-3,5-diene-1,2-diol 
• 17793-95-2 cis-1,2-dihydrocatechol 

Downstream Products

• 526-87-4 (1R,2S,3S,4S)-5-cyclohexene-1,2,3,4-tetrol 
• 129829-62-5 (+)-1D-Tetra-O-acetylcyclohexane-1,2,4/3-tetrol 
• 80226-74-0 (-)-(1R,2S,3S,4R)-1,2,3,4-tetraacetoxy-5-cyclohexene 
• 189389-04-6 (+)-(1S,2R,3R,4S)-1,2,3,4-tetraacetoxy-5-cyclohexene 
• 949887-64-3 (1R,2R,3S,6S)-6-(pivaloyloxy)cyclohex-4-ene-1,2,3-triyl triacetate 
• 220564-13-6 (1S,2S,3R,6R)-6-(pivaloyloxy)cyclohex-4-ene-1,2,3-triyl triacetate 
• 252316-80-6 (2S,3S)-diacetoxy-(1R,4R)-dihydroxycyclohex-5-ene 
• 1254-38-2 inositol peracetate 
• 80338-90-5 (1R,2S,3S,4R)-1,2,3,4,tetrahydroxy-5-cyclohexene 
• 253683-74-8 L-1,4-di-O-benzoyl-myo-inositol 
• 253584-57-5 C₂₆H₂₂Cl₆O₁₂ 

Relevant academic research and scientific papers

Synthesis of both enantiomers of conduritol C tetraacetate and of meso-conduritol D tetraacetate by oxidation of benzoquinone bis(ethylene acetal)

Epoxidation of p-benzoquinone bis(ethylene acetal) (1) with m-chloroperbenzoic acid or hydrogen peroxide/benzonitrile afforded corresponding monoepoxide 2, which was converted into p-benzoquinone mono(ethylene acetal) monoepoxide 5 with perchloric acid. D

Stereoselective synthesis of myo-, neo-, L-chiro, D-chiro, allo-, scyllo-, and epi-inositol systems via conduritols prepared from p-benzoquinone

A practical route is described for the flexible preparation of a wide variety of inositol stereoisomers and their polyphosphates. The potential of this approach is demonstrated by the synthesis of myo-, L-chiro-, D-chiro-, epi-, scyllo-, allo-, and neo-inositol systems. Optically pure compounds in either enantiomeric form can be prepared from p-benzoquinone via enzymatic resolution of a derived conduritol B key intermediate. High-performance anion-exchange chromatography with pulsed amperometric detection permits inositol stereoisomers to be resolved and detected with high sensitivity. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.

Synthesis of haloconduritols from an endo-cycloadduct of furan and vinylene carbonate

A method for preparing haloconduritols having a conduritol-A construction is described. A mixture of endo- and exo-cycloadduct derivatives prepared from the Diels-Alder reaction of furan and vinylene carbonate was converted into diacetate derivatives by hydrolysis (K2CO3/MeOH) followed by acetylation (Ac2O/pyridine). Boron trihalide (BBr3 or BCl3)-assisted ring-opening of the endo-diacetate in CH2Cl2 at -78°C gave (1α,2α,3β,6β)-6-halogeno-4-cyclohexene-1,2,3-triol 1,2-diacetate from which the corresponding triacetate was prepared by acetylation (AcCl). trans-Esterification of the triacetate (MeOH/HCl) afforded (1α,2α,3β,6β)-6-halogeno-4-cyclohexene-1,2,3-triol (X=Br or Cl). BF3-Assisted ring-opening of the endo-diacetate in CH2Cl2 gave (1α,2α,3β,6β)-6-chloro-4-cyclohexene-1,2,3-triol 1,2-diacetate by means of halogen exchange.

Optimisation of enantioselectivity for the chiral base-mediated rearrangement of bis-protected meso-4,5-dihydroxycyclohexene oxides: Asymmetric synthesis of 4-deoxyconduritols and conduritol F

A strategy based on diastereoselective epoxidation of a cyclohexene followed by chiral lithium amide-mediated epoxide rearrangement has been used to synthesise an allylic alcohol building block of >95% ee. The key step is the enantioselective rearrangement of a bis-protected meso-4,5-dihydroxycyclohexene oxide. A range of protecting groups and chiral base structures were surveyed in order to find the optimum protocol for high enantioselectivity. Using a tert-butyldimethylsilyloxy protecting group and a norephedrine-derived chiral base, a 93% yield of an allylic alcohol of >95% ee was achieved. To demonstrate the synthetic utility, this allylic alcohol was subsequently transformed into 4-deoxyconduritols and (+)-conduritol F.

Chiral base route to cyclic polyols: Asymmetric synthesis of aminodeoxyconduritols and conduritol F

A chiral base route from a meso cyclohexene oxide to an allylic alcohol provides key intermediates for the synthesis of cyclic polyols. A Mitsunobu approach and an Overman rearrangement approach transform allylic alcohols into some aminodeoxyconduritols (95% ee). Elaboration of a chiral enone (89% ee) via (i) α-hydroxylation and (ii) stereoselective reduction completes a high yielding synthesis of the tetraacetate of conduritol F.

Efficient synthesis of enantiopure conduritols by ring-closing metathesis

Two short synthetic approaches to enantiopure conduritols are described starting from the chiral pool. In both cases, the cyclohexene ring is assembled via ring-closing olefin metathesis. The terminal diene precursers for the metathesis reaction are prepared either from octitols or from tartaric acids. The former route involves a new method for selective bromination of the primary positions in long-chain carbohydrate polyols. Subsequent reductive elimination with zinc then generates the diene. The latter route uses a highly diastereoselective addition of divinylzinc to tartaric dialdehydes for preparation of the dienes.

Asymmetric induction of conduritols via AAA reactions: Synthesis of the aminocyclohexitol of hygromycin A

Two synthetic routes towards the construction of the aminocyclohexitol moiety of hygromycin A have been developed based on palladium-catalyzed asymmetric alkylation of conduritol derivatives. A protocol has been established whereby this biologically relev

From cycloolefins to chiral, polyfunctionalized linear C6/C12 building blocks - Biocatalysis, (-)-conduramine E

1,4-Cyclohexadiene is the starting material for the expeditious synthesis of the 1S2S3S4R- and 1R2R3R4S-epoxy-cyclohexene-1,4-diol monoacetates through enzyme-catalyzed hydrolysis and transesterification, respectively. The absolute configurations are established by correlation of (-)-10 and known (+)-conduramine E. Ozonation and functional group manipulation open access to fully protected, polyfunctionalized C6-aldehydes whose reductive coupling to C2-symmetrical C12 building blocks is being explored. (C) 2000 Elsevier Science Ltd.

An efficient enzymatic preparation of (+)- and (-)-conduritol E, a cyclitol with C2 symmetry

Lypozyme IM (immobilised lipase from Mucor miehei) catalyses the enantiomeric alcoholysis of tetraacetylconduritol E (±)-2 to give enantiopure (1R,2R,3R,4R)-tetrahydroxycyclohex-5-ene (-)-1, and the unreacted ester (1S,2S,3S,4S)-tetraacetyloxycyclohex-5-ene, (+)-2. The latter was transformed by basic hydrolysis into (+)-1 in high yield and 95% ee. Selective amination of partial ester (-)-3, obtained by short alcoholysis of (±)-2, furnished the previously unreported conduramine F-4, (-)-4.

Stereochemical observations on the bromate induced monobromopentahydroxylation of benzene by catalytic photoinduced charge transfer osmylation. A concise synthesis of (±)-pinitol

The use of lower temperatures in the title reaction favours the formation of the neo diastereoisomer of the deoxybromoinositol whose diisopropylidene derivative can be converted in three steps to (±)-pinitol.