A phosphoryl radical-initiated Atherton-Todd-type reaction using air as the radical initiator and CHCl3 as the halogenating reagent for the phosphorylation of alcohols, phenols, and amines has been developed. This novel transformation provides a highly efficient route to important phosphinates, phosphinic amides, and phosphoramidates in up to 99% yield with a broad substrate scope under very mild conditions
Reactions of 7-methoxyimino-4-methylchromene-2,8-dione with phosphines. Preparation of N-substituted 7-amino-8-hydroxy-4-methyl-2H-[1]-benzopyran-2-ones
作者:Demetrios N. Nicolaides、Raed Wajih Awad、Konstantinos E. Litinas、Elizabeth Malamidou-Xenikaki
DOI:10.1016/0040-4020(96)00923-4
日期:1996.11
7-Methoxyimino-4-methylchromene-2,8-dione 2 reacts with triarylphosphines 1(a-d) to give the unexpected 7-arylamino-8-hydroxy-4-methyl-2H-[1]-benzopyran-2-ones 7(a-d) and methyl diarylphosphinates 8(a-d) in high yields. The reaction of 2 with trialkylphosphines 1(e,f) as well as with diphenylphosphine 15 leads to the formation of the N-dialkylphosphinoyl derivatives 11, 12, 14 and the N-diphenylphosphinoyl
Photocatalyzed Aerobic Cross-Dehydrogenative Coupling of Diarylphosphine Oxides with Alcohols and Phenols
作者:Hongyan Zhou、Chengqi Wu、Yating Han、Bao Huang、Cunhui Wang、Shouying Mei、Jingya Yang
DOI:10.1021/acs.orglett.4c00580
日期:2024.3.29
A photocatalytic cross-dehydrogenative coupling of diarylphosphine oxides with alcohols and phenols has been developed. Using organic dye Rose Bengal as the photocatalyst and air as the oxidant, the reaction proceeded smoothly at room temperature. Both alcohols and phenols were feasible, affording various organophosphinates in high yields. The absence of a halogenating reagent, the absence of a transition-metal