Fleetingly formyl: A new rhodium-catalyzed hydroformylation reaction of N-allyl oxazolidines, carried out under a CO/H(2) atmosphere, followed by a diastereoselective deformylative cyclization affords hexahydropyrrolo[2,1-b]oxazoles in good yields. The reaction proceeds by a unique hydroformylation-deformylation sequence in which the formyl group virtually substitutes for the {CH(2)-O} fragment of the oxazolidine heterocycle.
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Vasylyev et al. (2009) studied this question.
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