Acylation of Diethyl Phosphonoacetic Acid Via the MgCl2/Et3N System: A Practical Synthesis of β-Keto Phosphonates
摘要:
A one pot simple procedure for the synthesis of beta-keto phosphonates has been developed using the MgCl2/Et3N base system to generate the magnesium enolate of diethyl phosphonoacetic acid. This intermediate reacts with acid chlorides or imidazolides to give, after workup, the title compounds in good yields.
Copper-Catalyzed Oxidative sp<sup>3</sup>-Carbon Radical Cross-Coupling with Trialkylphosphites Leading to α-Phosphonyl 1,3-Dicarbonyl Compounds
作者:Cheng-Kun Li、Ze-Kun Tao、Zhi-Hao Zhou、Xiao-Guang Bao、Shao-Fang Zhou、Jian-Ping Zou
DOI:10.1021/acs.joc.8b03093
日期:2019.2.15
A copper-catalyzed radical Csp3–H/P(OR)3 cross-coupling reaction for the formation of Csp3–P bonds is described. A range of 1,3-dicarbonyl compounds and trialkylphosphites were coupled in this fashion to give the corresponding products in moderate to good yields. This protocol provides direct access to α-phosphonyl 1,3-dicarbonyl compounds.