Synthesis of alkyl α-aminomethyl-phenylphosphinates and<i>N,N</i>-bis(alkoxyphenylphosphinylmethyl)amines by the microwave-assisted Kabachnik-Fields reaction
As a novel extension, the Kabachnik–Fieldsreaction was applied to the synthesis of alkyl α-aminomethyl-phenylphosphinates, and the double phospha-Mannich reaction was utilized in the preparation of bis(alkoxyphenylphosphinylmethyl)amines. A total of 27 new aminophosphinate derivatives were synthesized by the microwave-assisted solvent-free condensation of alkyl phenyl-H-phosphinates, paraformaldehyde
作为一个新的扩展,Kabachnik-Fields 反应被应用于合成烷基 α-氨基甲基-苯基次膦酸酯,双磷酸-Mannich 反应被用于制备双(烷氧基苯基膦基甲基)胺。通过烷基苯基-H-次膦酸盐、多聚甲醛和伯胺或仲胺的微波辅助无溶剂缩合,共合成了 27 种新的氨基次膦酸盐衍生物。起始 P 物种也在微波条件下制备。还研究了 N-甲基化氨基甲基-苯基次膦酸盐副产物的形成。
Redox-Neutral P(O)–N Coupling between P(O)–H Compounds and Azides via Dual Copper and Photoredox Catalysis
作者:Yanan Wu、Ken Chen、Xia Ge、Panpan Ma、Zhiyuan Xu、Hongjian Lu、Guigen Li
DOI:10.1021/acs.orglett.0c02207
日期:2020.8.7
We report a redox-neutral P(O)–N coupling reaction of P(O)–H compounds with azides via photoredox and copper catalysis, providing new access to useful phosphinamides, phosphonamides, and phosphoramides. This transformation tolerates a wide range of nucleophilic functionalities including alcohol and amine nucleophiles, which makes up for the deficiency of classical nitrogen nucleophilic substitution
Synthesis of P(O)-S organophosphorus compounds by dehydrogenative coupling reaction of P(O)H compounds with aryl thiols in the presence of base and air
作者:Wei He、Xiao Hou、Xinjin Li、Liang Song、Qing Yu、Zhongwei Wang
DOI:10.1016/j.tet.2017.04.035
日期:2017.6
The synthesis method of P(O)-S organophosphorus compounds by dehydrogenative coupling reaction of P(O)H compounds and aryl thiols was developed. The reaction was carried in the presence of a base and air, and exhibited good characters such as metal-free, mild reaction temperature, excellent substrate tolerance and with moderate to good yields. A plausible mechanism was proposed.
Nickel-Catalyzed Electrosynthesis of Aryl and Vinyl Phosphinates
作者:Farah Daili、Abdelhakim Ouarti、Marine Pinaud、Ibtihal Kribii、Stéphane Sengmany、Erwan Le Gall、Eric Léonel
DOI:10.1002/ejoc.202000422
日期:2020.6.23
A mild nickel‐catalyzed electrochemical approach for phosphonylation of aryl and vinyl bromides is reported. The used of iron/nickel alloy sacrificial anode process in undivided cell and under constant current electrolysis allowed to achieve C(sp2)–P cross‐couplings from alkyl H ‐phenylphosphinates and aryl or vinyl bromides. This electrochemical method enabled to prepare more than 30 new (hetero)aryl