An Efficient and General Method for the Stereodivergent Syntheses of Tadalafil-Like Tetracyclic Compounds
作者:Sen Xiao、Xiao-Xin Shi、Feng Ni、Jing Xing、Jing-Jing Yan、Shi-Ling Liu
DOI:10.1002/ejoc.200901378
日期:2010.3
A clean and general DBU-catalyzed epimerization at C-12a position of the tadalafil-like tetracyclic compounds has been fully studied. In addition, by using this clean epimerization as the key step, four stereomers of 6-d 1 -tadalafil were stereo-divergently synthesized from both L - and D -tryptophan methyl ester hydrochlorides and deuterated piperonal.
他达拉非样四环化合物的 C-12a 位的清洁和通用 DBU 催化差向异构化已得到充分研究。此外,通过使用这种干净的差向异构化作为关键步骤,从 L - 和 D - 色氨酸甲酯盐酸盐和氘代胡椒醛立体发散合成了 6-d 1 - 他达拉非的四种立体异构体。