The palladium‐catalyzed alkoxycarbonylation of aryl and heteroaryl halides using butyl formate has been investigated. In the presence of palladium(II) acetate/n‐butylbis(1‐adamantyl)phosphine (L1), and 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU) as base for the first time non‐activated chloroarenes can be conveniently carbonylated in good yields.
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Schareina et al. (2010) studied this question.
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