Highly stereoselective syntheses of alkenylsilanes and germanes utilizing cyclobutyl ketones
摘要:
(E)-alkenylsilanes 以高立体选择性合成,通过双相选择性加成二甲基芳香硅锂到转位-2-甲基环状单环三硫氰酸dehydes,以及配位酸促进行成的环状断裂反应所合成的环状乙醇二甲基交联产物。类似地,锌盐催化的环状断裂反应也能生产以高立体选择性合成(E)-1,5-二取代-1,5-二烯基硅烷和rades。该研究发表于1997年荷兰爱思 wer 出版社。
Highly stereoselective syntheses of alkenylsilanes and germanes utilizing cyclobutyl ketones
作者:Tooru Fujiwara、Koichi Sawabe、Takeshi Takeda
DOI:10.1016/s0040-4020(97)00541-3
日期:1997.6
(E)-Alkenylsilanes were synthesized with high stereoselectivity by the diastereoselective addition of the dimethylphenylsilyllithium to the trans-2-phenylthiocyclobucyl ketones and the Lewis acid-promoted stereospecific ring opening reactions of the resulting cyclobutanemethanol derivatives. (E)- 1,5-Disubstituted-1, 5-dienylsilanes and germanes were also produced stereoselectively by the similar zinc salt-catalyzed ring opening reaction of alpha-dimethylphenylsilyl- or alpha-triethylgermyl-1-[2-(trimethylsilyl-methyl)cyclobutane]methanol derivatives. (C) 1997 Elsevier Science Ltd.
(E)-alkenylsilanes 以高立体选择性合成,通过双相选择性加成二甲基芳香硅锂到转位-2-甲基环状单环三硫氰酸dehydes,以及配位酸促进行成的环状断裂反应所合成的环状乙醇二甲基交联产物。类似地,锌盐催化的环状断裂反应也能生产以高立体选择性合成(E)-1,5-二取代-1,5-二烯基硅烷和rades。该研究发表于1997年荷兰爱思 wer 出版社。
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.