Nucleophilic Displacement at Benzhydryl Centers: Asymmetric Synthesis of 1,1-Diarylalkyl Derivatives
作者:Yuri Bolshan、Cheng-yi Chen、Jennifer R. Chilenski、Francis Gosselin、David J. Mathre、Paul D. O'Shea、Amélie Roy、Richard D. Tillyer
DOI:10.1021/ol0361655
日期:2004.1.1
their corresponding toluenesulfonates and subsequent displacement with a range of carbon, nitrogen, oxygen, and sulfur nucleophiles proceeds in 81-96% yield. Enantiomerically enriched diarylmethanols 8a-c were activated and displaced with pyridine acetate enolate with complete stereochemical inversion at carbon to yield 1,1-diarylalkyl derivatives 10a-c without loss of optical purity.
[反应:见正文]活化1,1-二芳基甲醇作为相应的甲苯磺酸盐,然后用一系列碳,氮,氧和硫亲核试剂取代,收率为81-96%。活化对映体富集的二芳基甲醇8a-c,并用乙酸烯醇吡啶酯置换,在碳上完全立体化学转化,得到1,1-二芳基烷基衍生物10a-c,而没有光学纯度的损失。