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

TETRAHEDRON

卷:69

Article

Kapadia, Nirav¹  Harding, Wayne¹ 

[1] CUNY Hunter Coll, Dept Chem, New York, NY 10065 USA

关键词: C-H activation;    Direct arylation;    Oxa-Pictet-Spengler;    Phenanthrene;    Isochroman;   

DOI  :  10.1016/j.tet.2013.07.095

来源: Elsevier

【 摘 要 】

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 provides access to two biologically interesting scaffolds in simple and high yielding synthetic steps. (c) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

Free