A simple and practical strategy for the preparation of 1,2‐dithiole‐3‐thiones via copper‐catalyzed defluorinative thioannulation of trifluoropropynes has been developed using elemental sulfur as the sole sulfur source. This reaction displays a wide substrate scope and high functional group tolerance to afford the corresponding S‐heterocycles in moderate to good yields and features efficient construction
Triaryl-beta-trifluoromethyl thiophenes are synthesized from 1,3-dithiolium-4-olates and various substituted 1-aryl-3,3,3-trifluoro-1-propynes. The spectroscopic characteristics of the products and the regioselectivity of the reaction are discussed.
Meazza, Giovanni; Zanardi, Giampaolo; Piccardi, Paolo, Journal of Heterocyclic Chemistry, 1993, vol. 30, # 2, p. 365 - 371
作者:Meazza, Giovanni、Zanardi, Giampaolo、Piccardi, Paolo
DOI:——
日期:——
Synthesis of triaryl-4-trifluoromethylpyrazoles via 1,3-dipolar cycloaddition
作者:G. Meazza、G. Zanardi
DOI:10.1016/0022-1139(93)02953-c
日期:1994.5
Triaryl-substituted trifluoromethylpyrazoles may be synthesized from nitrileimines, formed in situ from the corresponding alpha-halohydrazones, and various substituted 1-aryl-3,3,3-trifluoro-1-propynes. The spectroscopic characteristics of the products and the regioselectivity of the reaction are discussed.
La Porta; Capuzzi; Bettarini, Synthesis, 1994, # 3, p. 287 - 290