Copper-Catalyzed Thiolation Cyclization of 1-Chloro-1,5-enynes with Sodium Hydrosulfide: Synthesis of CF3-Containing 1H-Isothiochromenes
摘要:
A copper-catalyzed regio-and stereoselective 6-exo-dig cyclization of 1-chloro-1,5-enynes with sodium hydrosulfide has been developed. In the presence of copper(I) iodide and sodium tert-butoxide, a variety of (Z)-1-methylene-3-(trifluoromethyl)-1-Hisothiochromenes were prepared in moderate to good yields via thiolation cyclization of 1-alkynyl-2-(2-chloro-3,3,3-trifluoroprop-1-enyl)benzenes with sodium hydrosulfide.
A copper-catalyzed regio-and stereoselective 6-exo-dig cyclization of 1-chloro-1,5-enynes with sodium hydrosulfide has been developed. In the presence of copper(I) iodide and sodium tert-butoxide, a variety of (Z)-1-methylene-3-(trifluoromethyl)-1-Hisothiochromenes were prepared in moderate to good yields via thiolation cyclization of 1-alkynyl-2-(2-chloro-3,3,3-trifluoroprop-1-enyl)benzenes with sodium hydrosulfide.