Synthesis of geminal bisphosphonates via organocatalyzed enantioselective Michael additions of cyclic ketones and 4-piperidones
作者:Ana Maria Faísca Phillips、Maria Teresa Barros
DOI:10.1039/c1ob06473h
日期:——
A Michael addition reaction of cyclic ketones and piperidones to a vinyl phosphonate is described. The reaction, catalyzed by chiral diamines, produced geminal γ-oxobisphosphonates in high yields (up to 92%) and very high ees (up to >99%). Disubstituted ketones gave drs of up to 8 : 92. The synthesis and characterization of several new compounds with potential biological activity is described.
描述了环酮和哌啶酮的迈克尔加成反应成膦酸乙烯基酯。由手性二胺催化的反应以高产率(高达92%)和非常高的ee(高达> 99%)产生了双结晶的γ-氧代双膦酸酯。双取代的酮最多可得到8:92的drs。描述了几种具有潜在生物活性的新化合物的合成和表征。