Stereoselective Synthesis of (<i>E</i>)- and (<i>Z</i>)-γ,δ-Unsaturated Ketones Using<i>trans</i>-2-Phenylthiocyclobutyl Ketones
作者:Tooru Fujiwara、Toshiaki Iwasaki、Takeshi Takeda
DOI:10.1246/cl.1993.1321
日期:1993.8
The reaction of 1-methoxymethyl-2-phenylthiocyclobutanes with phenylthiotrimethylsilane followed by hydrolysis gave (E)- and (Z)-γ,δ-unsaturated ketones with high stereoselectivity. The starting materials were easily prepared by the stereoselective addition of Grignard reagents to trans-2-phenylthiocyclobutyl ketones.
Synthesis of compounds with juvenile hormone activity—XII
作者:K. Mori
DOI:10.1016/s0040-4020(01)93821-9
日期:——
A stereoselective synthesis of the title compound (II) as well as that of its lowerhomolog, 6-ethyl-10-methylundeca-5-trans, 9-dien-2-one (III), was accomplished. Both were converted to methyl dl-12,14-dihomojuvenate (dl-C18-Cecropia juvenile hormone, I) and methyl dl-14-homojuvenate (IV), respectively. Analogs of the Cecropia juvenile hormones with an ethynyl substituent (XVIII and XIX) were also