Mitsunobu Approach to the Synthesis of Optically Active α,α-Disubstituted Amino Acids
作者:Jonathan E. Green、David M. Bender、Stona Jackson、Martin J. O’Donnell、James R. McCarthy
DOI:10.1021/ol802325h
日期:2009.2.19
α-azido esters by Mitsunobu reaction with HN3. Optimization of this reaction was shown to proceed at room temperature with high chemical yield using 1,1-(azodicarbonyl)dipiperidine (ADDP) and trimethylphosphine (PMe3). Complete inversion of configuration was observed at the α-carbon. Several α,α-disubstituted amino acids were synthesized in high overall chemical yield and optical purity.
已知立体化学构型的手性叔α-羟基酯通过与HN 3的Mitsunobu反应转化为α-叠氮基酯。已表明,使用1,1-(偶氮二羰基)二哌啶(ADDP)和三甲基膦(PMe 3)可以在室温下以高化学收率进行该反应的优化。在α-碳处观察到构型完全反转。以高的总化学产率和光学纯度合成了几种α,α-二取代的氨基酸。