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Tazarotene

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Name

Tazarotene

EINECS 601-516-4
CAS No. 118292-40-3 Density 1.22 g/cm3
PSA 64.49000 LogP 4.43150
Solubility Well soluble in water Melting Point 97-98 °C
Formula C21H21NO2S Boiling Point 499.8 °C at 760 mmHg
Molecular Weight 351.469 Flash Point 256.1 °C
Transport Information N/A Appearance White solid
Safety Risk Codes N/A
Molecular Structure Molecular Structure of 118292-40-3 (Tazarotene) Hazard Symbols N/A
Synonyms

3-Pyridinecarboxylic acid,6-[(3,4-dihydro-4,4-dimethyl-2H-1- benzothiopyran-6-yl)ethynyl]-,ethyl ester;Ethyl 6-((4,4-dimethylthiochroman-6-yl)ethynyl)nicotinate;Tazorac;Zorac;AGN 190168;

Article Data 11

Tazarotene Synthetic route

4,4-dimethylbenzothiopyran-6-ylacetylene

49608-01-7

6-chloro-3-pyridinecarboxylic acid ethyl ester

118292-40-3

tazarotene

Conditions
ConditionsYield
With palladium on activated charcoal; potassium acetate; triphenylphosphine In N,N-dimethyl-formamide at 80℃; for 5h; Temperature; Reagent/catalyst; Solvent; Sonogashira Cross-Coupling; Inert atmosphere;86.3%
118292-06-1

(4,4-dimethylthiochroman-6-yl)acetylene

49608-01-7

6-chloro-3-pyridinecarboxylic acid ethyl ester

118292-40-3

tazarotene

Conditions
ConditionsYield
Stage #1: 6-chloro-3-pyridinecarboxylic acid ethyl ester With potassium carbonate; triphenylphosphine; 5%-palladium/activated carbon In toluene at 45 - 50℃;
Stage #2: (4,4-dimethylthiochroman-6-yl)acetylene; copper(l) iodide In toluene at 45 - 115℃; Product distribution / selectivity;
60%
Stage #1: 6-chloro-3-pyridinecarboxylic acid ethyl ester With palladium on activated charcoal; potassium carbonate; sodium sulfate; triphenylphosphine In toluene at 50 - 55℃; for 2h; Sonogashira Cross-Coupling; Inert atmosphere;
Stage #2: (4,4-dimethylthiochroman-6-yl)acetylene With copper(l) iodide In toluene at 105 - 115℃;
9 g

6-[2-(4,4-dimethylthiochroman-6yl)ethynyl]nicotinic acid ethyl ester S-oxide

118292-40-3

tazarotene

Conditions
ConditionsYield
With N,N-dimethyl-formamide; phosphorus trichloride at -20℃; for 1h;59%
With phosphorus trichloride In N,N-dimethyl-formamide at -20℃; for 1h;59%
With phosphorus trichloride In N,N-dimethyl-formamide at -20℃; for 1h;59%

6-[2-(4,4-dimethylthiochroman-6-yl)ethynyl] nicotinic acid ethyl ester hydrochloride

118292-40-3

tazarotene

Conditions
ConditionsYield
With sodium hydrogencarbonate In water; ethyl acetate at 20℃; for 2h; pH=7.5 - 8;55%
With sodium hydrogencarbonate In water; ethyl acetate for 2 - 4h; Product distribution / selectivity;
118292-06-1

(4,4-dimethylthiochroman-6-yl)acetylene

118292-40-3

tazarotene

Conditions
ConditionsYield
With copper(l) iodide; potassium carbonate; tetrakis(triphenylphosphine) palladium(0); triphenylphosphine In tetrahydrofuran for 5h; Product distribution / selectivity; Heating / reflux;
With copper(l) iodide; triethylamine; bis-triphenylphosphine-palladium(II) chloride; triphenylphosphine In tetrahydrofuran at 25 - 30℃; for 24h; Product distribution / selectivity;
118292-06-1

(4,4-dimethylthiochroman-6-yl)acetylene

ethyl 6-chloronicotinoate

118292-40-3

tazarotene

Conditions
ConditionsYield
With n-butyllithium; tetrakis(triphenylphosphine)palladium (0); zinc(II) chloride In tetrahydrofuran; hexane; ethyl acetate
With n-butyllithium; tetrakis(triphenylphosphine)palladium (0); zinc(II) chloride In tetrahydrofuran; hexane; ethyl acetate
118292-06-1

(4,4-dimethylthiochroman-6-yl)acetylene

bis(triphenylphosphine)palladium(II) dichloride

49608-01-7

6-chloro-3-pyridinecarboxylic acid ethyl ester

118292-40-3

tazarotene

Conditions
ConditionsYield
In ethyl acetate; triethylamine
64-17-5

ethanol

118292-41-4

6-[2-(4,4-dimethylthiochroman-6-yl)ethynyl]nicotinic acid

118292-40-3

tazarotene

Conditions
ConditionsYield
With sulfuric acid Heating / reflux;
78-39-7

Triethyl orthoacetate

118292-41-4

6-[2-(4,4-dimethylthiochroman-6-yl)ethynyl]nicotinic acid

118292-40-3

tazarotene

Conditions
ConditionsYield
In toluene at 110 - 120℃; Product distribution / selectivity;
952294-18-7

6-[2-(4,4-dimethylthiochroman-6-yl)ethynyl] nicotinic acid hydrochloride

78-39-7

Triethyl orthoacetate

118292-40-3

tazarotene

Conditions
ConditionsYield
In toluene at 110 - 120℃; Product distribution / selectivity;

Tazarotene Specification

The Tazarotene, with the CAS register number 118292-40-3, has the systematic name of 3-Pyridinecarboxylic acid, 6-((3,4-dihydro-4,4-dimethyl-2H-1-benzothiopyran-6-yl)ethynyl)-, ethyl ester. And it is also called as 3-pyridinecarboxylicacid,6-((3,4-dihydro-4,4-dimethyl-2h-1-benzothiopyran-6-; Tazorac; Zorac; 6-[(3,4-Dihydro-4,4-dimethyl-2H-1-benzothiopyran)-6-yl]nicotinic acid ethyl ester. It is a kind of white solid and is soluble in water. Tazarotene is a member of the acetylenic class of retinoids. This medication is approved for treatment of psoriasis, acne, and sun damaged skin.

Physical properties about Tazarotene are: (1)ACD/LogP: 5.987; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 5.99; (4)ACD/LogD (pH 7.4): 5.99; (5)ACD/BCF (pH 5.5): 20904.67; (6)ACD/BCF (pH 7.4): 20904.74; (7)ACD/KOC (pH 5.5): 43054.20; (8)ACD/KOC (pH 7.4): 43054.34; (9)#H bond acceptors: 3; (10)#Freely Rotating Bonds: 4; (11)Index of Refraction: 1.625; (12)Molar Refractivity: 101.397 cm3; (13)Molar Volume: 286.961 cm3; (14)Polarizability: 40.197 10-24cm3; (15)Surface Tension: 57.5369987487793 dyne/cm; (16)Density: 1.225 g/cm3; (17)Flash Point: 256.053 °C; (18)Enthalpy of Vaporization: 76.823 kJ/mol; (19)Boiling Point: 499.772 °C at 760 mmHg

Uses of Tazarotene: There is limited evidence that tazarotene and isotretinoin benefit patients with moderate photodamage on the face: both are associated with skin irritation and erythema. Tazarotene is used to treat acne on the face and and to treat psoriasis.

You can still convert the following datas into molecular structure:
(1)InChI=1S/C21H21NO2S/c1-4-24-20(23)16-7-9-17(22-14-16)8-5-15-6-10-19-18(13-15)21(2,3)11-12-25-19/h6-7,9-10,13-14H,4,11-12H2,1-3H3;
(2)InChIKey=OGQICQVSFDPSEI-UHFFFAOYSA-N;
(3)Smilesc12c(cc(C#Cc3ccc(C(OCC)=O)cn3)cc1)C(CCS2)(C)C

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD oral > 2gm/kg (2000mg/kg)   Journal of the American Academy of Dermatology. Vol. 37(Suppl), Pg. S25, 1997.

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