Anion-Accelerated Palladium-Catalyzed Intramolecular Coupling of Phenols with Aryl Halides
作者:D. David Hennings、Seiji Iwasa、Viresh H. Rawal
DOI:10.1021/jo961876k
日期:1997.1.1
DERLIN, J. P., CAN. J. CHEM. <CJCH-A6>, 197, 53, NO 3, 343-349
作者:DERLIN, J. P.
DOI:——
日期:——
US3987186A
申请人:——
公开号:US3987186A
公开(公告)日:1976-10-19
Direct Transition-Metal-Free Intramolecular Arylation of Phenols
作者:Gan B. Bajracharya、Olafs Daugulis
DOI:10.1021/ol801897m
日期:2008.10.16
base-mediated intramolecular arylation of phenols with aryl halides has been developed. In the presence of 2.5 equiv of t-BuOK in dioxane at 140 degrees C, the intramolecular cyclization of 3-(2-halobenzyloxy)phenols affords 6H-benzo[c]chromenes in high yields. This reaction proceeds by an initial formation of a benzyne intermediate followed by an aromaticsp(2) C-H functionalization (a formal C-H activation)