1622-55-5

Basic information

• Product Name: 4-Oxo-9,10-dihydro-4H-benzo(4,5)-cyclohepta-(1,2b)thiophene
• Synonyms: 9,10-Dihydro-4H-benzo(4,5)cyclohepta(1,2-b)thiophen-4-one;9,10-Dihydro-4H-benzo[4,5]cyclohepta[1,2-b]-4-thiophenone;9,10-DIHYDRO-4-H-BENZO{4,5}CYCLOHEPTA-{1,2-B}-4-THIOPHENE;9,10-Dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one (90%);9,10-Dihydro-4H-benzo[4,5]cyclohepta[b]-thiophen-4-one
• CAS NO: 1622-55-5
• Molecular Formula: C₁₃H₁₀OS
• Molecular Weight: 214.287
• Product Categories: Aromatics;Heterocycles;Intermediates & Fine Chemicals;Pharmaceuticals
• Mol File: 1622-55-5.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 371.1 °C at 760 mmHg
• Flash Point: 178.2 °C
• Appearance: /
• Density: 1.262 g/cm³
• Vapor Pressure: 1.06E-05mmHg at 25°C
• Refractive Index: 1.644
• Storage Temp.: Refrigerator
• Solubility: Chloroform (Slightly), Methanol (Slightly)
• CAS DataBase Reference: 4-Oxo-9,10-dihydro-4H-benzo(4,5)-cyclohepta-(1,2b)thiophene(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Oxo-9,10-dihydro-4H-benzo(4,5)-cyclohepta-(1,2b)thiophene(1622-55-5)
• EPA Substance Registry System: 4-Oxo-9,10-dihydro-4H-benzo(4,5)-cyclohepta-(1,2b)thiophene(1622-55-5)

Safety Data

• Hazardous Substances Data: 1622-55-5(Hazardous Substances Data)

Usage

Chemical Properties

Brown Semi Solid

Uses

Intermediate in the preparation of Ketotifen.

InChI:InChI=1/C13H10OS/c14-13-10-4-2-1-3-9(10)5-6-12-11(13)7-8-15-12/h1-4,7-8H,5-6H2

Upstream product

• 89-71-4 2-Methyl-benzoic acid methyl ester 
• 100-39-0 benzyl bromide 
• 88-13-1 3-Thiophene carboxylic acid 
• 216368-49-9 2-(diethoxy-phosphorylmethyl)-benzoic acid methyl ester 
• 1966-89-8 2-[2-(thienyl)vinyl] benzoic acid 
• 2417-73-4 methyl 2-bromomethylbenzoate 
• 98-03-3 thiophene-2-carbaldehyde 
• 1622-54-4 2-[2-(thienyl)ethyl] benzoic acid 
• 125790-51-4 2-(2-phenylethyl)thiophene-3-carboxylic acid 

Downstream Products

• 111428-56-9 2-bromo-10-methoxy-4H-benzo<4,5>cyclohepta<1,2-b>thiophene-4-one 
• 5189-27-5 2-bromo-4H-9,10-dihydrobenzo[4,5]cyclohepta[1,2-b]thiophen-4-one 
• 91164-65-7 1,6,7,11b-tetrahydro-3-phenylbenzo<1,2>cyclohepta<3,4,5-hi>thieno<3,4-c>pyridine 
• 81885-62-3 N-(9,10-dihydro-4H-benzo<4,5>cyclohepta<1,2-b>thiophene-4-yl-methyl)benzamide 
• 34580-13-7 Ketotifen 
• 34580-13-7 (+)-(R)-4-(1-methyl-4-piperidylidene)-9,10-dihydro-4H-benzo<4,5>cyclohepta<1,2-b>thiopene-10-one 
• 124939-78-2 4-(9,10-dihydro-4H-benzo<4,5>cyclohepta<1,2-b>thiophene-4-ylidene)-1-methyltetrahydrothiopyranium iodide 
• 59743-84-9 10-methoxy-4H-benzo<4,5>cyclohepta<1,2-b>thiophen-4-one 
• 59743-88-3 10-methoxy-4-(1-methyl-4-piperidyl)-4H-benzo<4,5>cyclohepta<1,2-b>thiopene-4-ol 
• 34580-13-7 ketotifen 
• 22345-38-6 4-hydroxy-9,10-dihydro-4H-benzo<4,5>cyclohepta<1,2-b>thiophene 
• 4506-53-0 4H-benzo<4,5>cyclohepta<1,2-b>thiophene-4-one 
• 34580-11-5 10-bromo-4H-benzo<4,5>cyclohepta<1,2-b>thiophene-4-one 
• 34580-10-4 9,10-dibromo-9,10-dihydro-4H-benzo<4,5>cyclohepta<1,2-b>thiophene-4-one 

Relevant articles and documents

Facile Synthesis of 9,10-Dihydro-4H-Benzo [4,5] Cyclohepta [1,2-b] Thiophene-4-One: A Crucial Drug Intermediate-Application of Wittig-Horner Reaction

Synthesis of 9,10-dihydro-4H-benzo [4,5] cyclohepta[1,2-b] thiophene-4-one, a key pharmaceutical intermediate was described by two different routes. The formation of Cannizzaro reaction products was observed in first route. Wittig-Horner reaction conditions were utilized in the second route to obtain the title compound in good yield.