Wang Y, Wen F, Li Z. Selective Monoethynylation of 2-Oxoacetamides Using Calcium Carbide as a Concise Solid Alkyne Source.
Chem Asian J 2022;
17:e202200698. [PMID:
35972843 DOI:
10.1002/asia.202200698]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 07/26/2022] [Indexed: 11/05/2022]
Abstract
An efficient selective monoethynylation of 2-oxoacetamides using calcium carbide as a concise solid alkyne source is described. A series of multifunctional compounds, 2-hydroxybut-3-ynamides, are synthesized by this strategy. The salient features of this protocol are the use of inexpensive and easy-to-handle solid alkyne source as a surrogate of inflammable and explosive gaseous acetylene, transition-metal-free and mild condition, wide scope of substrates, high selectivity, high yield, and simple work-up procedure.
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