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Hantzsch Ester‐Mediated Synthesis of Phenanthridines under Visible‐Light Irradiation
Author(s) -
Nagode Savita B.,
Kant Ruchir,
Rastogi Namrata
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202000888
Subject(s) - chemistry , intramolecular force , photochemistry , photoinduced electron transfer , photocatalysis , combinatorial chemistry , photosensitizer , annulation , electron transfer , hydrogen atom , visible spectrum , functional group , organic chemistry , catalysis , group (periodic table) , materials science , polymer , optoelectronics
An efficient photocatalytic synthesis of phenanthridines mediated by an organo‐photoredox initiator Hantzsch ester has been developed via denitrogenative intramolecular annulation of benzotriazolyl chalcones. The highly reducing photoactivated Hantzsch ester facilitates the transformation of benzotriazolyl chalcones into phenanthridinyl chalcones through photoinduced electron transfer (PET) and hydrogen atom transfer (HAT) processes. The mild reaction conditions utilizing inexpensive Hantzsch ester as photosensitizer, wide reaction scope and excellent functional group tolerance are notable attributes of the methodology.