Potassium trimethylsilanolate induced cleavage of 1,3-oxazolidin-2- and 5-ones, and application to the synthesis of (R)-salmeterol
作者:Diane M. Coe、Rossana Perciaccante、Panayiotis A. Procopiou
DOI:10.1039/b212454h
日期:2003.3.27
A convenient and efficient method for the cleavage of 1,3-oxazolidin-5-ones and 1,3-oxazolidin-2-ones utilising potassium trimethylsilanolate in tetrahydrofuran is described. The benzyloxycarbonyl-protecting group is readily removed under the reaction conditions, whereas the N-benzoyl group is stable. A synthesis of (R)-salmeterol exploiting the 2-oxazolidinone ring as a protecting group for the ethanolamine moiety is also described.
描述了一种使用四氢呋喃中的三甲基硅醇钾裂解1,3-噁唑烷-5-酮和1,3-噁唑烷-2-酮的便捷高效方法。在反应条件下,苄氧羰基保护基易于脱除,而N-苯甲酰基则保持稳定。文中还描述了以2-噁唑烷酮环作为乙醇胺片段保护基合成(R)-沙美特罗的方法。