ethyl 4-diethoxyphosphoryl-3-oxobutanoate 在
二氧化铂 作用下,
以
甲醇 为溶剂,
反应 36.0h,
以to give 17.3 g (~100%) of the title compound as a white solid, m.p. 33° C. to 35° C.的产率得到4-(Diethoxyphosphinyl)-3-hydroxybutanoic acid, ethyl ester
参考文献:
名称:
Process for the preparation of 4-phosphinyl-3-keto-carboxylate and
Quasiracemic Synthesis: Concepts and Implementation with a Fluorous Tagging Strategy to Make Both Enantiomers of Pyridovericin and Mappicine
作者:Qisheng Zhang、Alexey Rivkin、Dennis P. Curran
DOI:10.1021/ja025606x
日期:2002.5.1
The concept of quasiracemic synthesis is introduced and illustrated with syntheses of bothenantiomers of pyridovericin (whose absolute configuration is assigned as R) and mappicine. Like racemic synthesis, quasiracemic synthesis provides bothenantiomers in a single synthetic sequence; however, separation tagging is used to ensure that quasiracemic mixtures can be analyzed, separated, and identified
Organocatalytic Domino Michael-Knoevenagel Condensation Reaction for the Synthesis of Optically Active 3-Diethoxyphosphoryl-2-oxocyclohex-3-enecarboxylates
dominoes: A novel, organocatalytic, Michael–Knoevenagel condensation domino reaction of ethyl 4‐diethoxyphosphoryl‐3‐oxobutanoate with various aryl‐ and aliphatic‐substituted α,β‐unsaturated aldehydes catalyzed by a chiral diarylprolinol ether has been successfully performed. The reaction proceeds in a highly enantio‐ and diastereoselective manner giving access to opticallyactive 6‐substituted‐3‐d
Abstract Diethyl 2,4-dioxoalkylphosphonates are prepared in excellent yields by Claisen condensation of the dianion of diethyl 2-oxoalkylphosphonates with ethyl esters or acyl chlorides in the presence of one equivalent of lithium diisopropylamide (LDA).
This paper describes a new strategy for the stereoselective synthesis of pyrrolizidine and indolizidine based enamino esters and their acylderivatives from l-proline. The key reaction in this process involves deprotection followed by ring closure of cyclic N-Boc amino-β-ketoesters. Also, the synthesis of 5R,9R-(−)-indolizidine 209D has been accomplished using this protocol.
本文描述了一种新的策略,用于从1-脯氨酸立体选择性地合成吡咯烷和吲哚并立定的烯胺酯及其酰基衍生物。该过程中的关键反应包括脱保护,然后关闭环状N -Boc氨基-β-酮酸酯的环。同样,已经使用该方案完成了5 R,9 R -(-)-吲哚并立定209D的合成。
An Efficient Synthesis of Dialkyl 2-Oxoalkanephosphonates and Diphenyl-2-oxoalkylphosphine Oxides from 1-Chloralkyl Ketones
作者:Bernard Corbel、Luc Medinger、Jean Pierre Haelters、Georges Sturtz
DOI:10.1055/s-1985-31424
日期:——
The synthesis of dialkyl 2-oxoalkanephosphonates and diphenyl-2-oxoalkyl-phosphine oxides, via an Arbuzov reaction of trialkyl phosphites or ethoxydiphenylphosphine with methoxycarbonylhydrazono derivatives of 1-chloroalkyl ketones followed by carbonyl deprotection, is described.