Abstract

We report here the first example of a stoichiometric hydroformylation using HMn(CO) 5. Treatment of a hexane solution of 1,2-diphenyl-3,3-dimethylcyclopropene with HMn(CO) 5 at 55°C gave after 5 h a 27% yield of aldehydes, 87% cis and 13% trans. The other major products were cis-(87%)-, and trans-(13%)-1,2-diphenyl-3,3-dimethylcyclopropane. Evidence for a radical intermediate is presented.

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