Enantioselective synthesis of an ent-trichothecene
作者:John C. Gilbert、Robert D. Selliah
DOI:10.1016/s0040-4020(01)80841-3
日期:1994.1
A convergent route for the enantioselective synthesis of trichothecenes is described. A key step in the synthetic sequence is an Ireland-Claisen rearrangement that occurs with total facial selectivity and high diastereoselectivity. The relative stereochemistry about the vicinal quaternary centers of the major diastereomer is that of the trichothecene skeleton, but the absolute stereochemistry is opposite to that of the natural products.
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