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The reaction of an alpha-oxo acid chloride with an organostannane proceeds transition metal-catalyst-free to afford a 1,2-diketone in an excellent yield. In addition, a sequence comprising pretreatment of oxalyl chloride with an organostannane and a subsequent treatment with another organostannane also works as a convenient modification.
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Kashiwabara et al. (2009) studied this question.
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