Total synthesis of (±)-4-deoxyverrucarol; a new route to trichothecanes via ring expansion of small ring compounds
作者:Hideo Nemoto、Junji Miyata、Masataka Ihara
DOI:10.1016/s0040-4039(99)00047-7
日期:1999.3
Totalsynthesis of 4-deoxyverrucarol (4), a trichothecane-type sesquiterpene was achieved via two types of ring expansion reaction, 1,2-rearrangement of 18 and palladium mediated ring expansion reaction of 20, as key steps providing a new route to trichothecanes.
Asymmetric Synthesis of 4-Deoxyverrucarol via Two Types of Ring Expansion Reactions
作者:Junji Miyata、Hideo Nemoto、Masataka Ihara
DOI:10.1021/jo991430e
日期:2000.1.1
Asymmetric synthesis of a trichothecane analogue, 4-deoxyverrucarol (2), was carried out through two types of ring expansionreactions. First, synthesis of the racemate of 2 was investigated. Thus, 1-[1-(tert-butyldimethylsiloxy)-ethyl]-1-methoxycarbonyl-2-hexen-4-on e (10), prepared by Diels-Alder reaction, was converted into the cyclopropylidene 15. The cyclobutanone (+/-)-18 was obtained from 15