Shi-Dong Xiu

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α-Imino rhodium carbene, readily generated from N-sulfonyl-1,2,3-triazole, underwent cycloaddition and subsequent rearrangement with a nitrosobenzene derivative to afford N-acylamidine. The unprecedented C-C bond cleavage of α-imino carbene was facilitated by the weakness of the N-O bond.
α-Imino rhodium carbenoids generated from 1-sulfonyl 1,2,3-triazole were applied to the 3 + 2 cycloaddition with ketene silyl acetal, offering a novel and straightforward synthesis of biologically interesting compound 3-pyrrolin-2-one with broad substrate scope.
N-allylynamides with various functional groups and different substitution patterns can be converted into 3-aza-bicyclo[3.1.0]hexan-2-one derivatives in moderate to high yield using IMesAuCl/AgBF4 as the catalyst and pyridine N-oxide as the oxidant. A noncarbene mediated approach is proposed as the mechanism.
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