Zhang XQ, Zhang C, Hu Z, Wang Y. Gold-Catalyzed Divergent
N/
O-Vinylations of
trans-2-Butene-1,4-amino Alcohols with Alkynes and the Cascade Rearrangements/Cyclizations to Dihydropyrroles and Dihydrofurans.
Org Lett 2023;
25:5800-5805. [PMID:
37498148 DOI:
10.1021/acs.orglett.3c02052]
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Abstract
Although the transition-metal-catalyzed vinylations of amines and alcohols via the additions to alkynes have been well developed, the selective vinylations of amino alcohols have been merely investigated. Herein, we report the gold-catalyzed divergent additions of trans-2-butene-1,4-amino alcohols' N-H and O-H groups to alkynes. The allyl enamine and allyl vinyl ether adducts then underwent a cascade (Aza-) Claisen rearrangement/cyclization sequence, furnishing the functionalized dihydropyrrole and dihydrofuran products.
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