Pd-Catalysed Suzuki coupling of α-bromoethenylphosphonates with organotrifluoroborates: a general protocol for the synthesis of terminal α-substituted vinylphosphonates
and robust protocol for the synthesis of terminal α-substituted vinylphosphonates via Suzuki coupling of α-bromovinylphosphonates with organotrifluoroborates has been successfully developed. This method features broad substrate scope, great functional group compatibilities, and easy scale-up ability. In addition to easy access of nucleophiles, straightforwardsynthesis of electrophiles was also realized
The Arbuzov reaction of trimethyl and triethyl phosphites with acyl chlorides gave 1-oxoalkylphosphonates in 57–80% yields. The Wittig reaction of the phosphonates with methylenetriphenylphosphorane gave vinylphosphonates in 25–59% yields. Hydroboration of vinylphosphonates in oxolane gave 2-hydroxyethylphosphonates in 50–65% yields. The procedure seems to be a good synthetic method to afford 1-alkyl-substituted
The reaction of α-nitroolefins with triethyl or diethyl phosphite was studied and structural assignment of the products was made by spectroscopic analyses. Ethyl α,β-unsaturated α-nitrocarboxylates (IV) and 1-nitroalkenes (V) reacted with triethyl phosphite to afford ethyl β-diethoxyphosphinyl-α,β-unsaturated-carboxylates (IX) and 2-diethoxyphosphinyl-1-alkenes (X), respectively. Compound (IV) reacted
A Simple and Efficient Method for One-Pot, Three-Component Synthesis of Terminal Vinylphosphonates Using a Task-Specific Ionic Liquid
作者:Sara Sobhani、Moones Honarmand
DOI:10.1055/s-0032-1317965
日期:——
convenient and practical method for the one-pot, three-componentsynthesis of terminal vinylphosphonates from readily available starting materials (aryl/alkyl/heteroaryl aldehydes, nitromethane and trialkylphosphites) through a tandem Henry–Michael reaction followed by nitro elimination in the presence of 5-hydroxypentylammonium acetate (5-HPAA) as a task-specific ionicliquid, is described. This method offers
Synthesis of branched 9-[2-(2-phosphonoethoxy)ethyl]purines as a new class of acyclic nucleoside phosphonates which inhibit Plasmodium falciparum hypoxanthine–guanine–xanthine phosphoribosyltransferase
作者:Dana Hocková、Antonín Holý、Milena Masojídková、Dianne T. Keough、John de Jersey、Luke W. Guddat
DOI:10.1016/j.bmc.2009.07.044
日期:2009.9.1
the salvage enzyme, hypoxanthine–guanine–xanthine phosphoribosyltransferase (HGXPRT), for the synthesis of the 6-oxopurine nucleoside monophosphates. Specific acyclicnucleosidephosphonates (ANPs) inhibit PfHGXPRT and possess anti-plasmodial activity. Two series of novel branched ANPs derived from 9-[2-(2-phosphonoethoxy)ethyl]purines were synthesized to investigate their inhibition of PfHGXPRT and