本文提出了在温和条件下利用N-卤代琥珀酰亚胺和二苯基膦氧化物合成通用手性和非手性( E )-α-卤代烯酰胺的简便立体选择性结构。该反应无金属、温和、高效、快速且实用,凸显了炔酰胺合成的多功能性。反应底物范围广;手性和非手性炔酰胺均已在很短的时间内转化为相应的 ( E )-α-卤代烯酰胺,而不会影响选择性或复杂性。
Regio- and stereospecific synthesis of (E)-α-iodoenamide moieties from ynamides through iodotrimethylsilane-mediated hydroiodation
作者:Akihiro H. Sato、Kazuhiro Ohashi、Tetsuo Iwasawa
DOI:10.1016/j.tetlet.2012.12.101
日期:2013.3
A facile approach to (E)-alpha-haloenamide moieties from ynamides using bromo- or iodotrimethylsilane is described. The simple protocol enables a regio- and stereospecific hydrohalogenation of the triple bond in gram-scale and provides a general entry for synthesis of novel enamide analogues. (C) 2012 Elsevier Ltd. All rights reserved.