He CT, Han XL, Zhang YX, Du ZT, Si CM, Wei BG. Sc(OTf)
3-catalyzed [3 + 2]-cycloaddition of nitrones with ynones.
Org Biomol Chem 2021;
19:457-466. [PMID:
33336677 DOI:
10.1039/d0ob02158j]
[Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient approach to access functionalized (2,3-dihydroisoxazol-4-yl) ketones has been developed by reacting nitrones 4 with ynones 7 or terminal ynones 10 in a one-pot fashion. The reaction went through a formal Sc(OTf)3-catalyzed [3 + 2]-cycloaddition process to generate a number of functionalized (2,3-dihydroisoxazol-4-yl) ketones 11aa-11aw, 11ba-11la and 12aa-12ae in moderate to good yields.
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