Rhodium-HMPT-catalyzed direct ortho arylation of phenols with aryl bromides
S Oi, S Watanabe, S Fukita, Y Inoue
Index: Oi, Shuichi; Watanabe, Shun-Ichiro; Fukita, Susumu; Inoue, Yoshio Tetrahedron Letters, 2003 , vol. 44, # 48 p. 8665 - 8668
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Citation Number: 104
Abstract
Direct ortho arylation of phenols with aryl bromides catalyzed by a rhodium complex and hexamethylphosphorous triamide (HMPT) have been developed. A plausible reaction mechanism involving in situ generation of arylphosphites from phenols and HMPT, phosphorus-directed ortho metalation, and transesterification of the arylated arylphosphites with the substrate phenols is proposed.
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