Formation and aromatization of strained bicyclic pyrazolidines via tandem reaction of alkyl 2-aroyl-1-chlorocyclopropanecarboxylates with acylhydrazones
作者:Zhimei Huang、Junhao Hu、Yuefa Gong
DOI:10.1039/c5ob01199j
日期:——
The formation and aromatization of strained bicyclic pyrazolidines.
Development of General Catalytic Allylation of Acylhydrazones with Pinacolyl Allylboronate Using an Indium(I) Catalyst
作者:Uwe Schneider、I-Hon Chen、Shū Kobayashi
DOI:10.1021/ol702756k
日期:2008.3.1
Catalytic allylation of various acylhydrazones using a group 13 metal reagent (boron) in combination with a group 13 metal catalyst in its low-oxidation state (indium) has been developed. This operationally simple carbon-carbon bond-forming reaction displays remarkable substrate scope and functional group tolerance.
Tin Powder-Promoted One-Pot Construction of α-Methylene-γ-lactams and Spirolactams from Aldehydes or Ketones, Acylhydrazines, and 2-(Bromomethyl)acrylate
作者:Yanli Xu、Danfeng Huang、Ke-Hu Wang、Junyan Ma、Yingpeng Su、Ying Fu、Yulai Hu
DOI:10.1021/acs.joc.5b02154
日期:2015.12.18
A concise and efficient method for the synthesis of alpha-methylene-gamma-lactams is developed from multicomponent one-pot reactions of aldehydes or ketones, hydrazides, and ethyl 2-(bromomethyl)acrylate promoted by tin powder. The reaction proceeds smoothly under mild reaction conditions without using any catalyst to give the corresponding products in high yields. alpha-Methylene-gamma-spirolactams can also be prepared from cyclic ketones.