Preparation of N-alkyl pyrrolidinones via photocyclization of γ-keto-α,β-unsaturated amides
摘要:
Photolysis of gamma-keto-alpha,beta-unsaturated amides provides N-alkyl pyrrolidinones in high yield (77-100%). The procedure is applicable to a variety of amides derived from the corresponding gamma-keto acid.
Synthesis of the polycyclic core of vincorine via cascade reactions
摘要:
We developed a six-step synthesis of the polycyclic core of vincorine using two cascades of reactions. A cascade of Michael-Mannich reactions was employed for one-pot preparation of a polycyclic intermediate, which was transformed into the desired polycyclic pyrroloindoline ring system using a cascade of methanolysis-N-imine cyclization reactions. (C) 2013 Elsevier Ltd. All rights reserved.