Simple Generation of Nonstabilized Azomethine Ylides through Decarboxylative Condensation of α-Amino Acids with Carbonyl Compounds via 5-Oxazolidinone Intermediates
作者:Otohiko Tsuge、Shuji Kanemasa、Masayuki Ohe、Shigeori Takenaka
DOI:10.1246/bcsj.60.4079
日期:1987.11
Heating α-amino acids with a variety of carbonyl compounds generates N-unsubstituted or N-substituted azomethine ylides of nonstabilized types through the elimination of water and carbon dioxide. The ylides are captured by olefinic, acetylenic, and carbonyl dipolarophiles producing pyrrolidines, pyrrolines, and oxazolidines. The reaction involves intermediary 5-oxazolidinones which can be sometimes
用各种羰基化合物加热 α-氨基酸,通过消除水和二氧化碳产生不稳定类型的 N-未取代或 N-取代的偶氮甲碱叶立德。叶立德被烯属、炔属和羰基亲偶极分子捕获,产生吡咯烷、吡咯啉和恶唑烷。该反应涉及有时可以分离的中间体 5-恶唑烷酮。母体偶氮甲碱叶立德的一些合成等价物,methaniminiummethylide,可通过该途径获得。