Mutual kinetic resolution of 3-methyl-3,4-dihydro-2H-1,4-benzoxazines and 2-alkoxyacyl chlorides
作者:Sergey A. Vakarov、Dmitry А. Gruzdev、Liliya Sh. Sadretdinova、Mikhail I. Kodess、Andrey A. Tumashov、Evgeny B. Gorbunov、Galina L. Levit、Victor P. Krasnov
DOI:10.1007/s10593-018-2286-y
日期:2018.4
Stereoselective acylation of racemic 3-methyl-3,4-dihydro-2Н-1,4-benzoxazine and its 7,8-difluoro-substituted analog with racemic 2-alkoxyacyl chlorides was stidied. The reactions of 3-methyl-3,4-dihydro-2H-1,4-benzoxazines with 2-methoxyisopentanoyl chloride were found to be more selective (selectivity factor s 31–32) compared to the acylation with other studied propanoyl chlorides (s 18–21). This
的立体选择性酰化外消旋3-甲基-3,4-二氢-2- Н -1,4-苯并恶嗪及其与外消旋2-烷氧基酰基氯化物-7,8-二氟取代的类似物,stidied。发现3-甲基-3,4-二氢-2 H -1,4-苯并恶嗪与2-甲氧基异戊酰氯的反应比与其他已研究丙酰氯的酰化反应具有更高的选择性(选择性系数s 31–32)(š 18-21)。该事实可能是由于与衍生自丙酸的试剂中的甲基相比,酰氯中的异丙基取代基引起了明显的位阻。