Chemoselectivity in the conjugate addition of allylsilane to Michael acceptors
作者:George Majetich、Ada M. Casares、D. Chapman、M. Behnke
DOI:10.1016/s0040-4039(00)81803-1
日期:1983.1
The allylic carbanion species generated by treatment of allylsilane with fluoride ion undergoes highly chemoselective conjugateaddition to a series of Michaelacceptors for which alternative known allylation procedures proved less general.
Ring construction by zirconium-promoted reductive coupling of nitrites with alkenes
作者:Miwako Mori、Noriaki Uesaka、Masakatsu Shibasaki
DOI:10.1039/c39900001222
日期:——
Intramolecular reductivecoupling of nitrite with alkene units in the presence of zirconocene prepared from (C5H5)2ZrCl2 and BuLi gives cyclic ketones; the intermediary metallacycle prepared from the 2-cyano-N-allylaniline derivative is very reactive and provides various quinoline derivatives by treatment with electrophiles and other reagents.
在由(C 5 H 5)2 ZrCl 2和BuLi制得的茂茂锆存在下,亚硝酸盐与烯烃单元的分子内还原偶联反应得到环状酮。由2-氰基-N-烯丙基苯胺衍生物制备的中间体金属环烷具有很高的反应活性,并通过亲电试剂和其他试剂处理可提供各种喹啉衍生物。
Titanium-mediated synthesis of bicyclic cyclopropylamines from unsaturated nitriles
Here we report an easy synthesis of bicyclic primary cyclopropylamines directly fromunsaturatednitriles. The described reaction involves Ti(II)-mediated intramolecular coupling of alkene and nitrile moieties.
Reinvestigation of the fluoride-triggered condensation of allyltrimethylsilane with cinnamonitrile: ‘abnormal Sakurai’ and sequential ‘abnormal Sakurai’–Michael–Thorpe Ziegler side reactions
Together with the expected 1,4-adduct, three by-products are generated in the fluoride-triggered condensation of altyltrimethylsilane with cinnamonitrile: the 1,3 adduct, an acyclic dinitrile and a cyclopentenaminonitrile issuing, respectively, from 'abnormal Sakurai', 'abnormal Sakurai'-Michael and 'abnormal Sakurai'-Michael-Thorpe Ziegler side reactions. (C) 2002 Elsevier Science Ltd. All rights reserved.
MORI, MIWAKO;UESAKA, NORIAKI;SHIBASAKI, MASAKATSU, J. CHEM. SOC. CHEM. COMMUN.,(1990) N8, C. 1222-1224