Cationic cyclization of regular α-monoterpenols as a model for tri- and tetracyclic diterpene biosynthesis
作者:V.V Veselovsky、V.A Dragan、A.M Moiseenkov
DOI:10.1016/s0040-4039(00)88762-6
日期:1990.1
Low-temperature boron trifluoride etherate initiated cyclization of α-geraniol, α-nerol, and α-linalool leads to regioisomeric dimethylvinylcyclohexenes possessing a rare monoterpene carbon skeleton along with bicyclo[3.2.1]octyl fluoride. The cyclization mimics biosynthesis of tri- and tetracyclicditerpenes according to Wenkert.
Intermediates for use in the preparation of vitamin E
申请人:AVENTIS ANIMAL NUTRITION S.A.
公开号:EP1179531A1
公开(公告)日:2002-02-13
Novel intermediate compounds which can be used in the preparation of phytone and Vitamin E and a process for the preparation thereof. A process for the preparation of phytone and Vitamin E from these compounds is also claimed.
Palladium(0)-catalyzed reaction of isoprene with water was enhanced by the presence of carbondioxide and a base to give dimethyloctadienols. The same catalyst was found to dehydrate the dimethyloctadienols to afford the corresponding dimethyloctatrienes. The effect of acidity of water on the isoprene-water reaction was also studied.