We report here a flexible synthesis of chiral, D4-symmetric porphyrins from cyclic ketone starting materials. Two porphyrins have been synthesized from the terpene 1-R-(+)-nopinone, obviating the need to perform a resolution. The chloromanganese derivative of one of these porphyrins is a good catalyst for the epoxidation of terminal alkenes, providing epoxides with e.e.'s of 70% with high turnover
我们在这里报告了从环状酮原料中灵活合成手性D 4对称
卟啉的方法。从萜烯1-R-(+)-nopinone合成了两种
卟啉,无需进行拆分。这些
卟啉之一的
氯锰衍
生物是末端烯烃环氧化的良好催化剂,可提供具有70%ee的ee和高周转率的
环氧化物。讨论了手性口袋中氧原子转移的预测模型。