A novel stereoselective synthesis of (E)-2-arylvinylphosphonates in InCl3–NaBH4–MeCN system
摘要:
Hydroindation of arylalkynylphosphonates gives a intermediate which can be hydrolyzed to (E)-2-arylvinylphosphonates in InCl3-NaBH4 MeCN system, the stereoselectivity and yield are rather high, but under the same conditions 2-alkylalkynylphosphonates do not react very well. (c) 2005 Elsevier B.V. All rights reserved.
An efficient and novel method was developed towards the synthesis of alkenylphosphonates from simple olefins and phosphonate diesters. This method was enabled by the use of cheap and commercially available silver salts and TEMPO. This method exhibits of good functional group tolerance, specific (E)‐selectivity for all olefins and vinyl‐selectivity for aliphatic olefins. A radical mechanism was proposed
Cu(<scp>i</scp>)/Fe(<scp>iii</scp>)-Catalyzed C–P cross-coupling of styrenes with H-phosphine oxides: a facile and selective synthesis of alkenylphosphine oxides and β-ketophosphonates
作者:Jian Gu、Chun Cai
DOI:10.1039/c7ob00505a
日期:——
Cu(I)/Fe(III)-Catalyzed phosphorylation and oxyphosphorylation of styrenes with H-phosphonates which can be controlled by varying the reaction temperature are developed. This study offers a new and expedient strategy for the synthesis of useful alkenylphosphine oxides and β-ketophosphonates in satisfactory yields. Moreover, the transformation is proposed to proceed via a radical process and exhibits
A novel method for the preparation of fluoroaryl- and fluoroalkyl-substituted bis- and tris-phosphonic acids
作者:R. Classen、G. Hagele
DOI:10.1016/0022-1139(95)03387-4
日期:1996.3
formation of various aromatic fluorinated vinylphosphonates, geminal and vicinal bisphosphonates and trisphosphonates by the Wittig-Horner-Emmons reaction and Michael addition is presented. The regiospecific direction of Michael addition under basic catalysis is largely dependent on the substitution pattern of the vinylphosphonates. The pentafluorophenyl-substituted vinylphosphonate 8d and diethyl phosphite
介绍了通过维蒂希-霍纳-埃蒙斯反应和迈克尔加成反应形成的各种芳族氟化乙烯基膦酸酯,双和邻位双膦酸酯和三膦酸酯。在碱性催化下迈克尔加成的区域特异性方向在很大程度上取决于乙烯基膦酸酯的取代模式。五氟苯基取代的乙烯基膦酸酯8d与亚磷酸二乙酯反应生成新的三膦酸酯5。该反应序列通过亲核取代取代了C 6 F 5单元的对氟原子,同时发生了膦酸酯基团同时向乙烯基双键的亲核加成。描述了显式NMR研究。
Synthesis of (<i>E</i>)- and (<i>Z</i>)- Alkenylphosphonates Using Vinylboronates
作者:George W. Kabalka、Sankar K. Guchhait
DOI:10.1021/ol027515a
日期:2003.3.1
(E)- and (Z)-alkenylphosphonates have been prepared stereospecifically via the reaction of vinylboronate esters with triethyl phosphite in the presence of palladium acetate.