Tf<sub>2</sub>O/DMSO-mediated dual activation of aryl phosphinate to access various aryl phosphonates
作者:Hui-Qi Yue、Da-Wei Shi、Ming Li、Si-Qi Gao、Mu-Xin Sun、Shun Zhang、Shang-Dong Yang、Bin Yang
DOI:10.1039/d3cc03250g
日期:——
A metal-free method for the dual activation of aryl phosphinate has been developed; the P–H and P–O bonds are sequentially activated by the Tf2O/DMSO system. Without the requirement of metals and unstable P-reagents, this one-pot procedure provides a convenient and practical access to a variety of aryl phosphonates. A mechanism involving twice generation of electrophilic P-species and two SN-processes
Second Generation Catalytic Enantioselective Nucleophilic Desymmetrization at Phosphorus (V): Improved Generality, Efficiency and Modularity
作者:Michele Formica、Branislav Ferko、Thomas Marsh、Timothy A. Davidson、Ken Yamazaki、Darren J. Dixon
DOI:10.1002/anie.202400673
日期:2024.4.24
two-phase strategy for the enantioselectivesynthesis of stereogenic at phosphorus (V) compounds. This protocol, consisting of a bifunctional iminophosphorane (BIMP) catalyzed nucleophilic desymmetrization of prochiral, bench stable P(V) precursors and subsequent enantiospecific substitution allows for divergent access to a range of C-, N-, O- and S- substituted P(V) compounds from a handful of enantioenriched
用于对映选择性合成立体源磷 (V) 化合物的第二代催化两相策略。该方案由双功能亚氨基正膦 (BIMP) 催化的前手性、工作台稳定的 P(V) 前体的亲核去对称化和随后的对映特异性取代组成,允许不同地获得一系列C -、 N -、 O - 和S - 取代的 P( V) 来自少数对映体富集中间体的化合物。
Water-Promoted Mild and General Michaelis–Arbuzov Reaction of Triaryl Phosphites and Aryl Iodides by Palladium Catalysis
作者:Jin Zhang、Wei Hu、Zihan Chen、Nuo Wu、Chunya Li、Tieqiao Chen、Li-Biao Han
DOI:10.1021/acs.orglett.4c00820
日期:2024.4.26
A Pd-catalyzed relatively general Michaelis–Arbuzov reaction of triaryl phosphites and aryliodides for preparing useful aryl phosphonates was developed. Interestingly, water can greatly facilitate the reaction through a water-participating phosphonium intermediate rearrangement process, which also makes the reaction conditions rather mild. In comparison with the known methods, this reaction is milder