作者:Giovanni Desimoni、Giuseppe Faita、Mariella Mella
DOI:10.1016/0040-4020(96)00817-4
日期:1996.10
Bis(oxazolines), disubstituted in the 4 and 5 positions, are synthesized from dimethylmalonyl bis-diamides of the suitable 1,2-disubstituted chiral aminoethanol. Starting from the same diamide, the ring closure can be realized either with retention (reflux in xylene with dibutyl tin dichloride - the Masamune protocol) or inversion (conversion into the mesylate and reflux with aqueous ethanolic NaOH)
由合适的1,2-二取代的手性氨基乙醇的二甲基丙二酰基双-二酰胺合成在4和5位被二取代的双(恶唑啉)。从相同的二酰胺开始,闭环可以通过保留(在二甲苯中二氯二丁基锡在二甲苯中回流-Masamune方案)或转化(转化为甲磺酸酯并用NaOH乙醇水溶液回流)来实现。位置5。