Efficient, highly enantioselective syntheses of (+) and (−)-anti-benzo[a]pyrene diol epoxide (BPDE) from 9,10-dihydrobenzo[a]pyrene are described. Initial epoxidation catalyzed by (salen) Mn(III) complex gives 7,8-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene (>90% ee). Acid-catalyzed hydration occurs regio- and stereo-selectively to furnish the trans-tetrahydrodiols which are converted into the optically
描述了由9,10-二氢苯并[a] py制成的高效,高对映选择性的(+)和(-)-抗-苯并[a] py二醇
环氧化物(BPDE)。(salen)Mn(III)配合物催化的初始环氧化反应得到7,8-环氧-7,8,9,10-四氢苯并[a] py(> 90%ee)。酸催化的
水合在区域和立体选择性地发生,以提供反式-四氢二醇,该反式-四氢二醇被转化为光学活性的抗-BPDE。