Inversion of diastereoselectivity under high pressure conditions: Diels–Alder reactions of 12-N-substituted derivatives of (−)-cytisine with N-phenylmaleimide
作者:Inna P. Tsypysheva、Sophia S. Borisevich、Alexander N. Lobov、Alena V. Kovalskaya、Vadim V. Shamukaev、Rustam L. Safiullin、Sergey L. Khursan
DOI:10.1016/j.tetasy.2015.06.005
日期:2015.7
Diels–Alder adducts of 12-N-substituted derivatives of (−)-cytisine with N-phenylmaleimide were synthesized. The conditions of effective diastereodifferentiation were found: the thermal Diels–Alderreaction of 12-N-substituted derivatives of (−)-cytisine with N-phenylmaleimide leads to 3aS, 4R, 12aR, 12bS adducts, while under high pressure, adducts with 3aR, 4S, 12aS, 12bR configurations of new asymmetric