Rh<sup>III</sup>-Catalyzed Regioselective Preparation of 3-Hetero-Substituted Isocoumarins from Aryl Carboxylic Acids and Alkynes
作者:Lijuan Song、Jing Xiao、Wanrong Dong、Zhihong Peng、Delie An
DOI:10.1002/ejoc.201601330
日期:2017.1.10
An oxygen-mediated annulation reaction has been reported herein. Various 3-hetero-substituted isocoumarins were successfully prepared with high efficiency (yields up to 88 %) and good functional-group tolerance (35 examples) in the presence of a rhodium catalyst. A plausible mechanism has also been proposed that shows the high regioselectivity mostly likely originates from the electron-density difference
Cs<sub>2</sub>CO<sub>3</sub>-Promoted One-Pot Synthesis of Alkynylphosphonates, -phosphinates, and -phosphine Oxides
作者:Yulei Wang、Jiepeng Gan、Liu Leo Liu、Hang Yuan、Yuxing Gao、Yan Liu、Yufen Zhao
DOI:10.1021/jo500312n
日期:2014.4.18
trialkyl phosphites, ethyl diphenylphosphinite, or diethyl phenylphosphonite has been developed under metal-free conditions, providing a practical and powerful tool for one-pot synthesis of valuable alkynylphosphonates, -phosphinates, and -phosphine oxides in good to excellent yields.
在无金属条件下开发了一种新颖且有效的Cs 2 CO 3促进的各种1,1,1-二溴-1-烯烃与容易获得的亚磷酸三烷基酯,乙基二苯基亚膦酸酯或二乙基苯基亚膦酸酯的磷酸化或亚膦酰基化,提供了实用而有效的方法一锅合成有价值的炔基膦酸酯,-次膦酸酯和-膦氧化物的工具,产率很高。
Base-Induced One-Pot Preparation of N- or P-Substituted Alkynes
作者:Yang Zhang、Yanqin Zhang、Jing Xiao、Zhihong Peng、Wanrong Dong、Delie An
DOI:10.1002/ejoc.201501092
日期:2015.12
An efficient method for the formation of C(sp)–N or C(sp)–P bonds is described. The facile transformation proceeds under mild conditions (0 or –20 °C) in a one-pot manner, and does not require transition-metal catalysts. The base-induced protocol exhibits good functional group tolerance (up to 44 examples) and high efficiency (up to 94 % yield) towards rare heteroatom-substituted acetylenes (N or P)
Mukaiyama reagent-promoted metal-free preparation of alkynyl sulfones and phosphonates under mild conditions
作者:Danyang Qi、Wanrong Dong、Zhihong Peng、Yingjun Zhang、Delie An
DOI:10.1016/j.tet.2019.06.035
日期:2019.8
An efficient and mild route for the formation sulfur or phosphor-substituted alkynes was herein demonstrated. The Mukaiyama reagent-mediated transformation started from easily-accessible substrates without carbon-carbon triple bonds, and the reaction proceeded undermildconditions (room temperature) in a one-pot manner, requiring for no transition metal-catalysts. The practical protocol featured for
Synthesis of Phosphachromones by Cyclized Coupling of Ethyl Hydrogen (Phenylethynyl)phosphonate with Arynes
作者:Yu Guo、Jianke Su、Jian Xu、Qiuling Song
DOI:10.1021/acs.orglett.3c01938
日期:2023.9.8
been reported via the insertion of arynes into P–O bonds. This operationally simple reaction is compatible with different functional groups, affording various phosphachromones by the simultaneous formation of C–P and C–O bonds in one step with moderate to good yields, and the Fries rearrangement involvingphosphorusatoms is a key step in the reaction.