Mao ZY, Nie XD, Feng YM, Si CM, Wei BG, Lin GQ. Cu(OTf)
2 catalyzed Ugi-type reaction of
N,
O-acetals with isocyanides for the synthesis of pyrrolidinyl and piperidinyl 2-carboxamides.
Chem Commun (Camb) 2021;
57:9248-9251. [PMID:
34519320 DOI:
10.1039/d1cc03113a]
[Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The Cu(OTf)2 catalyzed Ugi-type reactions of N,O-acetals with isocyanides have been described for the synthesis of pyrrolidinyl and piperidinyl 2-carboxamides. 4-Hydroxy-5-substituted-prolinamides can be obtained in high diastereoselectivities (2,4-cis/trans > 19 : 1) and a stereoselective model was proposed for 2,4-cis selectivity. Moreover, 4-F-VH 032, a novel analog of the VHL ligand, was conveniently obtained by utilizing the present method.
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