56671-83-1

Basic information

• Product Name: 2-Cyclohexen-1-one, 3-bromo-2-methyl-
• CAS NO: 56671-83-1
• Molecular Formula: C7H9BrO
• Molecular Weight: 189.052
• Mol File: 56671-83-1.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 2-Cyclohexen-1-one, 3-bromo-2-methyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Cyclohexen-1-one, 3-bromo-2-methyl-(56671-83-1)
• EPA Substance Registry System: 2-Cyclohexen-1-one, 3-bromo-2-methyl-(56671-83-1)

Safety Data

• Hazardous Substances Data: 56671-83-1(Hazardous Substances Data)

Upstream product

• 125493-39-2 5-(4,4-Dimethoxy-butyl)-2,4,4-trimethyl-3-trimethylsilanylmethyl-1-trimethylsilanyloxy-cyclohexene 
• 32774-63-3 3-hydroxy-2-methyl-cyclohex-2-enone 

Downstream Products

• 56745-19-8 3-n-butyl-2-methyl-2-cyclohexen-1-one 
• 1122-20-9 2,3-dimethylcyclohex-2-en-1-one 
• 56745-21-2 3-tert-butyl-2-methyl-2-cyclohexen-1-one 
• 26114-84-1 2-methyl-3-(penta-1,3-dien-1-yl)cyclohex-2-enone 
• 81770-85-6 2-methyl-3-(1-hydroxy-2-cyclohexen-1-yl)-2-cyclohexen-1-one 
• 81770-83-4 2-methyl-3-(1-hydroxycyclohexane-1-yl)-2-cyclohexen-1-one 
• 459174-04-0 methyl 2-methyl-3-oxo-1-cyclohex-1-enecarboxylate 
• 125344-34-5 2-Methyl-3-trimethylsilanylmethyl-cyclohex-2-enone 
• 34562-14-6 3,4,4,-trimethyl-2-cyclohexanone 
• 130895-05-5 3-(2-Methyl-3-oxo-cyclohex-1-enyl)-propionic acid methyl ester 
• 130895-06-6 6-Methyl-7-oxo-spiro[4.5]decane-1,3-dicarboxylic acid dimethyl ester 
• 130895-07-7 3-(2-Benzenesulfonyl-ethyl)-2-methyl-cyclohex-2-enone 
• 130895-08-8 3-(2-Benzenesulfonyl-ethyl)-2-methyl-cyclohexanone 

Relevant articles and documents

Asymmetric synthesis of 1,2,3-trisubstituted cyclopentanes and cyclohexanes as key components of substance P antagonists

An efficient asymmetric synthesis of 1,2,3-trisubstituted cyclopentanes and cyclohexanes is described. Three methods were developed for the preparation of the 2,3-disubstituted cyclopentenones and cyclohexenones, which are key achiral building blocks. These intermediates are reduced catalytically with (R)-2-methyloxazaborolidine in high yield (82-98%) and excellent ee (89-96%). Directed reduction of the chiral allylic alcohols using Red-Al gives exclusively the 1,2-anti stereochemistry (>99:1). Epimerization of the ester center followed by saponification/crystallization affords the desired hydroxyacids in good yield (65-70%) and in high enantiomeric excess (>99%).