Improved formal preparation of enantiomerically pure anti-benzo[a]pyrene diol epoxide
作者:George R. Negrete、Thomas Meehan
DOI:10.1016/s0040-4039(00)76952-8
日期:1994.7
We report an improved, economical formal route to enantiomerically pure anti-benzo[a]pyrene diol epoxide (BPDE). A trimethylaluminum catalyzed regio- and stereoselective opening of racemic 7,8-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene with Mosher's acid delivers benzylic esters exclusively. This step is a significant improvement over the lack of regioselectivity of standard procedures. We also show that
我们报告了对映体纯的抗-苯并[ a ]二醇环氧(BPDE)的一种改进的,经济的正式途径。三甲基铝与Mosher's酸催化外消旋7,8-环氧-7,8,9,10-四氢苯并[ a ] gio的区域和立体选择性开环,仅提供苄基酯。该步骤是对标准方法缺乏区域选择性的重大改进。我们还表明,后续化学步骤的修饰进一步缩短了对映体纯的抗-BPDE的制备。