作者:Giancarlo Berti、Paola Caroti、Giorgio Catelani、Luigi Monti
DOI:10.1016/0008-6215(83)88353-0
日期:1983.12
Abstract l -Glutamic acid has been converted into a separable mixture of d -amicetono- and l -rhodinono-γ-lactones by a sequence involving transformation into (S)-γ-carboxy-γ-butyrolactone (2), conversion of 2, conversion of 2 into the corresponding methyl ketone by the diazoketone route, and selective reduction with zinc borohydride or borane-methyl sulfide. Reduction of the two lactones with di-isobutylaluminium
摘要通过涉及转化为(S)-γ-羧基-γ-丁内酯(2),转化为2,通过重氮酮途径将2转化为相应的甲基酮,然后用硼氢化锌或硼烷-甲基硫醚选择性还原。用氢化二异丁基铝还原两个内酯得到相应的脱氧糖。尽管制备2的方法有所改进,但该步骤的光学收率仅为约80%,但从氯仿中结晶一次后,其光学纯度提高到96%。随后的步骤仅产生4%的光学纯度损失。