Dialkyl acylphosphonates: a new acylating agent of alcohols
作者:Mitsuo Sekine、Akiko Kume、Tsujiaki Hata
DOI:10.1016/s0040-4039(01)81975-4
日期:1981.1
Diethyl benzoylphosphonate (1) underwent facile benzoylation of alcohols in the presence of DBU. Reactions of diols containing primary and secondary hydroxyl groups with 1 gave predominantly monobenzoates in which primary hydroxyl groups were highly selectively benzoylated. Related acylations were also described.
Reactions of acyl tributylphosphonium chlorides and dialkyl acylphosphonates with Grignard and organolithium reagents
作者:Hatsuo Maeda、Kenji Takahashi、Hidenobu Ohmori
DOI:10.1016/s0040-4020(98)00767-4
日期:1998.10
Ketones and esters (4) were effectively prepared by reaction of Grignard reagents with acyl tributylphosphonium chlorides (2), diethyl acylphosphonates (5), or diisopropyl acylphosphonate (6) derived from acid chlorides and chloroformates (1). Although by the method with 2, 4 is prepared in one-pot operation from 1 and generally in a higher yield, the method with 5 or 6 proved to compensate for the
Preparation of α-ketophosphonates by a [3,3]-sigmatropoic shift of enolphosphonates
作者:Kamyar Afarinkia、Andrew J. Twist、Hiu-wan Yu
DOI:10.1016/j.jorganchem.2004.10.016
日期:2005.5
α-Ketophosphonates are prepared by a [3,3]-sigmatropicshift of enolphosphonates.
α-酮膦酸酯是通过烯醇膦酸酯的[3,3]-σ位移而制备的。
Preparation of Asymmetric α-Ketophosphonates by [3,3]-Sigmatropic Shift of Enolphosphonates
作者:Kamyar Afarinkia、Andrew J. Twist、Hiu-wan Yu
DOI:10.1021/jo049133j
日期:2004.9.1
α-Ketophosphonates are prepared by a [3,3]-sigmatropicshift of enolphosphonates.
α-酮膦酸酯是通过烯醇膦酸酯的[3,3]-σ位移制备的。
A NEW METHOD FOR ACYLATION OF ENOLATES BY MEANS OF DIALKYL ACYLPHOSPHONATES AS ACYLATING AGENTS
作者:Mitsuo Sekine、Akiko Kume、Masashi Nakajima、Tsujiaki Hata
DOI:10.1246/cl.1981.1087
日期:1981.8.5
Acylations of various enolates by means of diethyl acylphosphonates were described. For the acylation of acetophenone, lithium bis(trimethylsilyl)amide (LSA) was found to be suitable as the base. The scope and limitation of the benzoylation using diethyl benzoylphosphonates were also described.