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BF 3 ·OEt 2 ‐Promoted Intramolecular Nucleophilic Substitution; Synthesis of Dibenzopyranones and Coumarins from Biaryltriazenes
Author(s) -
Shang Xiaobo,
Xu Lijun,
Yang Weijun,
Zhou Jun,
Miao Maozhong,
Ren Hongjun
Publication year - 2013
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201300660
Subject(s) - chemistry , annulation , intramolecular force , lewis acids and bases , nucleophilic substitution , nucleophilic aromatic substitution , nucleophile , stereochemistry , combinatorial chemistry , medicinal chemistry , organic chemistry , catalysis
A simple and highly efficient reaction promoted by Lewis acid has been demonstrated for the synthesis of dibenzopyranones. The metal‐free annulation can tolerate a series of functional groups and also allows the synthesis of coumarins and phenanthridinones in good to excellent yields.