A silica-supported bidentate phosphine palladium complex was prepared from poly - 4 - oxa - 6, 7 - bis (diphenylphosphino) heptyl siloxane and palladium chloride in acetone. It was an efficient catalyst for the amidation of aryl halides with carbon monoxide and aniline at 1 atm pressure, affording aryl amides.
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Cai et al. (1997) studied this question.
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