Soeta T, Yao S, Sugiyama H, Ukaji Y. Silylacetate-promoted addition reaction of isocyanides to nitrones: effective synthesis of C(1)-carboxamide derivatives.
Org Biomol Chem 2024;
22:1619-1623. [PMID:
38315089 DOI:
10.1039/d3ob01777j]
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Abstract
We report an efficient method for the synthesis of C(1)-carboxamide derivatives by adding isocyanides to 3,4-dihydroisoquinoline N-oxides and 3,4-dihydro-β-carboline 2-oxide in the presence of TMSOAc. 3,4-Dihydroisoquinoline-1-carboxylamide derivatives and 9-dihydro-3H-pyrido[3,4-b]indole-1-carboxamide derivatives were obtained in reasonable yields. The method could be used to synthesize alangiobussine, an alkaloid, in 61% yield.
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