InBr3-catalyzed intramolecular cyclization of 2-alkynylanilines leading to polysubstituted indole and its application to one-pot synthesis of an amino acid precursor
作者:Norio Sakai、Kimiyoshi Annaka、Takeo Konakahara
DOI:10.1016/j.tetlet.2005.11.121
日期:2006.1
We describe InBr3-catalyzed cyclization of 2-alkynylaniline derivatives having a variety of functional groups producing polysubstituted indoles. This methodology could be applied to the one-pot synthesis of an amino acid precursor by the addition of a catalytic amount of the indium salt, an imine, and TMSCl.
Facile stereoselective synthesis of 1,3-disubstituted-4-trichloromethyl azetidin-2-ones
作者:V.V. Govande、A.R.A.S. Deshmukh
DOI:10.1016/j.tetlet.2004.07.047
日期:2004.8
The highly stereoselective synthesis of 1,3-disubstituted-4-trichloromethyl azetidin-2-ones by the [2+2] cycloaddition of ketenes with imines derived from chloral is described. (C) 2004 Elsevier Ltd. All rights reserved.