Improved Robust Method for Preparing Optically Active 3-Alkyl-3-phenyl-1,4-dioxane-2,5-diones; A Promising New Chiral Template
作者:Yoo Tanabe、Ryohei Nagase、Yuuki Iida、Mikiko Sugi、Tomonori Misaki
DOI:10.1055/s-0028-1083211
日期:2008.11
A robust method for preparing (3S)-3-alkyl-3-phenyl-1,4-dioxane-2,5-diones was developed using an improved cyclocondensation reaction between (S)-α-alkylmandelic acids and 2-bromocarbonyl halides. Subtle differences in the reaction conditions, including separate additions of triethylamine, significantly increased the yield compared with Schollkopf's original method.
使用改进的 (S)-α-烷基扁桃酸和 2-溴羰基卤化物之间的环缩合反应,开发了一种制备 (3S)-3-烷基-3-苯基-1,4-二恶烷-2,5-二酮的稳健方法。与 Schollkopf 的原始方法相比,反应条件的细微差异(包括单独添加三乙胺)显着提高了产率。