condensation of carbanions of α-chloro-α-lithiated phosphonates with carbonyl precursors gives direct access to α-chlorine-β-carbonyl phosphonates. The reactions with ethylformate, dimethylformamide, carboxylic esters, diethyl carbonates, diethyl oxalates etc. are discussed. In each case the intermediates have been identified.
Bismuth(III)-Catalyzed Sequential Enamine–Imine Tautomerism/2-Aza-Cope Rearrangement of Stable β-Enaminophosphonates: One-Pot Synthesis of β-Aminophosphonates
作者:Ming Jin、Shi-fu Yin、Shang-Dong Yang
DOI:10.1021/acs.orglett.0c00796
日期:2020.4.3
successfully applied to the one-pot synthesis of β-aminophosphonates with high efficiency and good tolerance. In this tandem reaction, Bi(OTf)3 exhibits unique activities and promotes both of enamine–iminetautomerism and 2-aza-Cope rearrangement.
Synthetic methods and reactions. 119. N-Formylmorpholine: a new and effective formylating agent for the preparation of aldehydes and dialkyl (1-formylalkyl)phosphonates from Grignard or organolithium reagents
作者:George A. Olah、Lena Ohannesian、Massoud Arvanaghi
DOI:10.1021/jo00194a045
日期:1984.10
A Simple Synthesis of Dialkyl 1-Formylalkanephosphonates
5,6-Dihydro-1,3-oxazines. XXIII. Chemistry of 2-chloromethyloxazines. Formation of phosphoranes and phosphonates. Use of .alpha.,.beta. unsaturated oxazines as a common intermediate for the synthesis of aldehydes, ketones, and acids