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Hantzsch dihydropyridines are popular reducing reagents in organocatalysis. The N-aminated Hantzsch dihydropyridine 1 has now been used as a novel efficient precursor for Boc-protected carbamoyl radicals. The readily prepared reagent was employed for the radical-transfer hydroamination of various olefins. Stereoselective hydroamination of chiral enecarbamates afforded vicinal diamines in good stereoselectivities. Boc=tert-butyloxycarbonyl.
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Guin et al. (2007) studied this question.
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