The invention relates, in general, to an improved process for converting compounds of Formula II (below) to compounds of Formula III (below), which are key intermediates for the synthesis of ezetimibe, or to ezetimibe itself, wherein in Formulas II and III, R represents hydrogen, alkyl, or a hydroxyl protecting group (e.g., benzyl group, a substituted benzyl group, or a silyl group). The invention further includes the use of the described process and the use of compounds of Formula III made by the described process for the preparation of ezetimibe.
本发明总体上涉及一种改进的工艺,用于将公式II(如下所示)的化合物转化为公式III(如下所示)的化合物,这些化合物是合成依泽替米伯的关键中间体,或者是依泽替米伯本身,其中在公式II和III中,R代表氢、烷基或羟基保护基团(例如,苄基团、取代的苄基团或
硅基团)。本发明进一步包括使用所描述的工艺以及使用通过所述工艺制备的公式III化合物来制备依泽替米伯。