Tandem N-Alkylation−C-Allylation Reaction of α-Imino Esters with Organoaluminums and Allyltributyltin
摘要:
On treatment of various alpha-imino esters with organoaluminum reagents and allyltributyltin in the presence of benzoyl peroxide, the tandem reaction proceeded to give the N-alkylation-C-allylation products in good yields. The tandem N-alkyation-C-cyanation also proceeded using silyl or aluminum cyanide to give the aminonitrile in good yield.
Conjugated imines and iminium salts as versatile acceptors of nucleophiles
作者:Makoto Shimizu、Iwao Hachiya、Isao Mizota
DOI:10.1039/b814930e
日期:——
development of synthetic methodologies where nucleophilicaddition reactions to imino carbons are utilized in crucial steps. This article summarizes double nucleophilicaddition reactions with alpha,beta-unsaturated aldimines, addition reactions using alkynyl imines, "umpoled" reactions of alpha-imino esters, and the use of iminium salts as reactive electrophiles.
Tandem N-Alkylation−C-Allylation Reaction of α-Imino Esters with Organoaluminums and Allyltributyltin
作者:Yasuki Niwa、Makoto Shimizu
DOI:10.1021/ja029639o
日期:2003.4.1
On treatment of various alpha-imino esters with organoaluminum reagents and allyltributyltin in the presence of benzoyl peroxide, the tandem reaction proceeded to give the N-alkylation-C-allylation products in good yields. The tandem N-alkyation-C-cyanation also proceeded using silyl or aluminum cyanide to give the aminonitrile in good yield.
An umpolung reaction of α-iminothioesters possessing a cyclopropyl group
An umpolung N-alkylation reaction of α-cyclopropyl α-iminothioesters with diethylaluminum chloride or ethylmagnesiumbromide affords the corresponding N-ethylated α-aminothioesters in good yields. Subsequent oxidation and reaction of the N-ethylated product with a thiolate or a chloride anion proceed effectively to give the ring-opened products in good yields. In contrast, relatively “hard” nucleophiles