Journal
TETRAHEDRON LETTERS
Volume 46, Issue 6, Pages 959-962Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2004.12.027
Keywords
electrophilic substitution; phosphenium salt; palladium; carboxylation; catalyst
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Addition of a phosphenium dramatically improved the reaction yields in the carboxylation of arenes by formic acid catalyzed by Pd(II). Control experiments revealed that the majority of the phosphenium triflate was converted to a mixed anhydride of phosphonic acid and formic acid (7), which however did not Substitute for the phosphenium to improve the reaction yield. (C) 2004 Elsevier Ltd. All rights reserved.
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