Tetrahedron

Synthesis of annelated [a] aza-anthracenones and thieno [3, 2-g] aza-naphthalenones through ring transformation of 2H-pyran-2-one followed by photocyclization

A Sharon, R Pratap, PR Maulik, VJ Ram

Index: Sharon, Ashoke; Pratap, Ramendra; Maulik, Prakas R.; Ram, Vishnu Ji Tetrahedron, 2005 , vol. 61, # 15 p. 3781 - 3787

Full Text: HTML

Citation Number: 13

Abstract

A concise synthesis of some new classes of heterocycles (4-aryl-11-oxo-1, 2, 3, 11- tetrahydro-1, 3a-diaza-cyclopenta [a] anthracen-6-carbonitriles and 5-aryl-12-oxo-1, 3, 4, 12- tetrahydro-2H-1, 4a-diazabenzo [a] anthracene-7-carbonitriles) has been developed by the ring transformation of suitably functionalized 2H-pyran-2-one with α-oxoketene cyclic aminals to intermediates (8-aroyl-5-aryl-2, 3-dihydro-1H-imidazo [1, 2-a] pyridine-7- ...