Synthesis of 2-Unsubstituted 1,3-Selenazoles by Cyclization of Selenoformamide with<i>α</i>-Bromocarbonyl Compounds
作者:Harald Below、Wolf-Diethard Pfeiffer、Karlheinz Geisler、Ashot S. Saghyan、Christine Fischer、Peter Langer
DOI:10.1002/jhet.2076
日期:2015.3
2‐Unsubstituted 1,3‐selenazoles were prepared by cyclization of selenoformamide with α‐bromoacetophenones. Parent 1,3‐selenazole was prepared by cyclization of selenoformamide with α‐bromoacetaldehyde.
Synthesis of Bis(arylethynyl) Selenides by One-Pot Protocol
作者:Yun-Xing Zhu、Zi-Jian Zhao、Yang Zhang、Qiong Su、Zhi-Hong Peng、De-Lie An
DOI:10.1002/hc.21208
日期:2015.1
An efficient method without using terminal arylacetylenes as substrates for the synthesis of bis(arylethynyl) selenides 1 (ArCCSeCCAr) was described, and a series of compounds 1a−1m have been obtained by a one-pot three-step strategy from the corresponding bis(arylethanonyl) selenides. The mechanism was identified through trapping and characterization of a key intermediate 2a, and an elimination using