Regio- and stereospecific synthesis of (E)-α-iodoenamide moieties from ynamides through iodotrimethylsilane-mediated hydroiodation
摘要:
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.
Brønsted acid-catalyzed α-halogenation of ynamides from halogenated solvents and pyridine-N-oxides
作者:Seung Woo Kim、Tae-Woong Um、Seunghoon Shin
DOI:10.1039/c6cc10286g
日期:——
The keteniminium ions generated from the protonation of ynamides formed reversible adducts with counter anions and pyridine-N-oxides as well as halogenated solvents. Above 80 oC, the halonium ions selectively undergo...
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.