A Simple and Efficient Synthesis of Dibenzothiophene via BF3·OEt2-Promoted Intramolecular Annulation
摘要:
A simple and efficient protocol promoted by BF3 center dot OEt2 for synthesizing functionalized dibenzothiophenes (DBTs) has been demonstrated. The annulation condition can tolerate a variety of functional groups.
Lewis Acid-Promoted Synthesis of Unsymmetrical and Highly Functionalized Carbazoles and Dibenzofurans from Biaryl Triazenes: Application for the Total Synthesis of Clausine C, Clausine R, and Clauraila A
作者:Weijun Yang、Jun Zhou、Binjie Wang、Hongjun Ren
DOI:10.1002/chem.201102802
日期:2011.12.2
A natural approach: A Lewis acid‐promoted nucleophilic aromatic substitution approach to the regioselective synthesis of highly substituted carbazoles and dibenzofurans has been developed. The annulation process is applied to the totalsynthesis of carbazole alkaloids clausineC, clausineR, and clauraila A (see scheme).