Facile synthesis of 4, 5, 6a, 7-tetrahydrodibenzo [de, g] chromene heterocycles and their transformation to phenanthrene alkaloids

N Kapadia, W Harding

Index: Kapadia, Nirav; Harding, Wayne Tetrahedron, 2013 , vol. 69, # 42 p. 8914 - 8920

Full Text: HTML

Citation Number: 4

Abstract

Abstract Oxa-Pictet–Spengler cyclization and microwave-assisted C–H arylation have been implemented as key steps in the synthesis of new isochroman heterocycles containing a 4, 5, 6a, 7-tetrahydrodibenzo [de, g] chromene motif. These isochromans may be easily transformed to phenanthrene alkaloids via acidic cleavage of the isochroman ring and standard synthetic manipulations thereafter. The route described is attractive in that it ...