Abstract

Reduction of C = N double bond is the most important phase I metabolism process of quaternary benzophenanthridine alkaloids (QBAs). Inspired by the NADPH mediated reduction in QBAs, a visible-light promoted reductive aminomethylation of QBAs for synthesis of 6-substituted benzophenanthridines was reported using QBAs and N,N-dimethylaniline as coupling partners in this study. An α-amino radical that derived from QBAs was supposed to be the key intermediate in this visible-light promoted reductive aminomethylation reaction.

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