An efficient synthesis of 3-alkyl-1,5,3-dioxazepanes and their use as electrophiles in double-Mannich reactions
摘要:
An efficient synthesis of 3-alkyl 1,5,3-dioxazepanes was developed for subsequent use in double-Mannich reactions with a variety of carbon-based nucleophiles. It was found that addition of methyltrichlorosilane to the dioxazepane led to a long-lasting reactive species that reacted rapidly with acid-sensitive ketones and beta-ketoesters to afford azabicyclo[3.3.1]nonanes in good yield. (C) 2011 Elsevier Ltd. All rights reserved.
Efficient one-pot method for the synthesis of bis-propargylamines by the reaction of terminal acetylenes with 1,5,3-dioxazepanes catalyzed by cоpper chloride
作者:Guzel R. Khabibullina、Firuza T. Zaynullina、Diana S. Karamzina、Askhat G. Ibragimov、Usein M. Dzhemilev
DOI:10.1016/j.tet.2017.03.015
日期:2017.4
An efficient method for the synthesis of N-substituted bis-propargylamines and bis(alkadiynyl)amines was developed. The method consists of the CuCl-catalyzed aminomethylation of terminal acetylenes and α,ω-diacetylenes with N-substituted 1,5,3-dioxazepanes.
One-pot synthesis of azacyclodiynes by reaction of α,ω-diacetylenes with 1,5,3-dioxazepanes using copper-containing catalysts
作者:Guzel R. Khabibullina、Firuza T. Zaynullina、Boris I. Kutepov、Askhat G. Ibragimov、Usein M. Dzhemilev
DOI:10.1007/s10593-018-2235-9
日期:2018.1
An effective method has been developed for the synthesis of cyclic propargylamines by aminomethylation of alpha,omega-diacetylenes with N-alkyl-substituted 1,5,3-dioxazepanes in the presence of copper-containing catalysts.