Synthesis of 1,1-Disubstituted Tetrahydroisoquinolines by Lithiation and Substitution, with in Situ IR Spectroscopy and Configurational Stability Studies
作者:Xiabing Li、Iain Coldham
DOI:10.1021/ja500485f
日期:2014.4.16
The organolithium is configurationally stable at low temperature, and the asymmetric synthesis of 1,1-disubstituted tetrahydroisoquinolines can be achieved with high yields and high enantiomer ratios. The chemistry was applied to the preparation of FR115427 and provides a way to recycle the undesired enantiomer in the synthesis of solifenacin.
N-Boc-1-苯基四氢异喹啉的锂化通过原位红外光谱优化。测定了氨基甲酸酯基团的旋转动力学和有机锂的对映异构化动力学。有机锂在低温下构型稳定,可以高收率和高对映体比实现1,1-二取代四氢异喹啉的不对称合成。该化学反应用于制备 FR115427,并提供了一种在索利那新合成中回收不需要的对映异构体的方法。