Karthikeyan S, Shobana RK, Subimol KR, Monica JHR, Kumar AKK. Azidophosphonium salt-directed chemoselective synthesis of (
E)/(
Z)-cinnamyl-1
H-triazoles and regiospecific access to bromomethylcoumarins from Morita-Baylis-Hillman adducts.
Beilstein J Org Chem 2020;
16:1579-1587. [PMID:
32704324 PMCID:
PMC7356223 DOI:
10.3762/bjoc.16.130]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/22/2020] [Indexed: 11/23/2022] Open
Abstract
The direct transformation of Morita–Baylis–Hillman (MBH) adducts into molecules of interest is a crucial process wherein allylic hydroxy-protected or halogenated MBH adducts are commonly preferred. Herein, we report an azidophosphonium salt (AzPS)-catalysed straight forward protocol for synthesising structurally demanding (E)/(Z)-cinnamyl-1H-1,2,3-triazoles and halomethylcoumarins from MBH adducts. The novel methodology, efficient catalyst, and direct utilization of MBH adducts under mild reaction conditions qualify the reported procedures as powerful synthetic tools.
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