52039-28-8Relevant articles and documents
Access to gem-Dibromoenones Enabled by Carbon-Centered Radical Addition to Terminal Alkynes in Water Solution
Zeng, Xianghua,Xu, Yuhai,Liu, Jiawei,Deng, Yuanyuan
, p. 9058 - 9062 (2021/11/24)
We herein report a novel and more practical approach to prepare gem-dibromoenones from terminal alkynes, tetrabromomethane (CBr4), and water in a single step. Mechanistic studies reveal that the generation of a tribromomethyl radical with the assistance of a persulfate salt (K2S2O8) is essential to this transformation. The reaction features readily available chemicals, a broad substrate scope, a green solvent, and mild reaction conditions, providing an efficient alternative for construction of halogen-substituted enones.
SYNTHESE VON 1,3-THIAZINIUMSALZEN AUS β-CHLORVINYLKETONEN UND THIOAMIDFUNKTIONELLEN VERBINDUNGEN
Schroth, W.,Spitzner, R.,Koch, B.,Freitag, S.,Mielke, D.
, p. 937 - 948 (2007/10/02)
Thiocarbamoyl compounds A (aliphatic and aromatic thioamides, thioureas, dithiocarbamates, thiosemicarbazones etc.) and β-chlorovinyl-ketones B react to 1,3-thiazinium salts D (1-51) via S-ketovinyl-thioimidium derivatives C.The heterocyclizations are eas