A simple and efficient one‐pot microwave‐assisted click formation of 1‐(substituted)‐1H‐1,2,3‐triazol‐4‐yl)methyl)diphenylphosphineoxide derivatives via Huisgen regioselective [3+2]‐cycloaddition of an in situ generated organic azides and diphenyl(prop‐2‐yn‐1‐yl)phosphine oxide in highly polar DMSO‐H2O medium. This synthetic protocol is mild, requires shorter reaction time, and afforded products in
通过Huisgen区域选择性[3 + 2]-环加成一个简单且有效的单锅微波辅助点击形成1-(取代)-1 H -1,2,3-三唑-4-甲基)二苯基膦氧化物衍生物在高极性DMSO-H 2 O介质中原位生成有机叠氮化物和二苯基(prop-2-yn-1-基)氧化膦。该合成方案温和,需要更短的反应时间,并以高产率提供具有高区域选择性的产物。
Gabriel, Chemische Berichte, 1905, vol. 38, p. 1690
作者:Gabriel
DOI:——
日期:——
CeCl3·7H2O: a highly efficient catalyst for the synthesis of 1-substituted-octahydro-[1,3,2]diazaphospholo[1,5-a]pyridine-1-oxide
An efficient and simple protocol is reported for the synthesis of a new class of 1-substituted-octahydro[1,3,2]diazaphospholo[1,5-a]pyridine-1-oxides in good to excellent yield (88-95%) via Michaelis Arbuzov rearrangement. Condensation of diamido phosphite with various halides at 60 degrees C using CeCl3 center dot 7H(2)O as a highly efficient catalyst afforded the products within a short period of reaction time. This procedure is mild, efficient, and non-toxic and stability of the catalyst is the merit of this process. Therefore, this protocol being environmentally benign and efficient, serves as an alternative procedure for the preparation of the title compounds. (C) 2013 Elsevier Ltd. All rights reserved.
Dehalogenation of Substituted Pyrimidines in vivo<sup>1</sup>
作者:Harold W. Barrett、Robert A. West
DOI:10.1021/ja01589a030
日期:1956.4
Fischer,E.; Roeder, Chemische Berichte, 1901, vol. 34, p. 3759