139697-18-0

Basic information

• Product Name: (3E,5E,7E)-3,7-Dimethyl-9-(2,6,6-trimethyl-cyclohex-1-enyl)-nona-3,5,7-triene-1,2-diol
• Synonyms: (3E,5E,7E)-3,7-Dimethyl-9-(2,6,6-trimethyl-cyclohex-1-enyl)-nona-3,5,7-triene-1,2-diol
• CAS NO: 139697-18-0
• Molecular Weight: 304.473
• Mol File: 139697-18-0.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: (3E,5E,7E)-3,7-Dimethyl-9-(2,6,6-trimethyl-cyclohex-1-enyl)-nona-3,5,7-triene-1,2-diol(CAS DataBase Reference)
• NIST Chemistry Reference: (3E,5E,7E)-3,7-Dimethyl-9-(2,6,6-trimethyl-cyclohex-1-enyl)-nona-3,5,7-triene-1,2-diol(139697-18-0)
• EPA Substance Registry System: (3E,5E,7E)-3,7-Dimethyl-9-(2,6,6-trimethyl-cyclohex-1-enyl)-nona-3,5,7-triene-1,2-diol(139697-18-0)

Safety Data

• Hazardous Substances Data: 139697-18-0(Hazardous Substances Data)

Upstream product

• 3230-76-0 10,15-dihydroxy-9,13-dimethyl-7-(1,1,5-trimethyl-5-cyclohex-6-enyl)-8,11,13-nonatriene 
• 139697-15-7 Acetic acid (2Z,4Z,6E)-8-chloro-3,7-dimethyl-9-(2,6,6-trimethyl-cyclohex-1-enyl)-nona-2,4,6-trienyl ester 

Relevant articles and documents

PMR STUDY OF REACTION OF 10,15-DIHYDROXY-9,13-DIMETHYL-7-(1,1,5-TRIMETHYL-5-CYCLOHEX-6-ENYL)-8,11,13-NONATRIENE ACETATES WITH HYDROCHLORIC ACID

Dehydration of acetylated 10,15-dihydroxy-9,13-dimethyl-7-(1,1,5-trimethyl-5-cyclohex-6-enyl)-8,11,13-nonatriene by hydrochloric acid gives as intermediate products a mixture of 8-chloro- and 14-chloroacetates whose proportion depends on the solvent used in the reaction.Dehydrochlorination turns 8-chlorine derivatives into 14-chlorine derivatives from which vitamin A acetate is then formed.The precursor of 13-Z-retinyl acetate seems to be 11-E,13-isomer of 8-chloroacetate.A general conversion scheme is proposed and the reaction rate constants are determined.