A simple and practical copper catalyzed C‐4 carboxylation reaction of 1‐naphthylamide derivatives using carbon tetra bromide and methanol is reported here. Picolinamide and its derivatives are used as a bidentate directing group for the distal C4‐H functionalization. Various substituted naphthylamide derivatives, and anilides are employed for the carboxylation and proceeds in good yields under mild
Heterogeneous copper-catalyzed C S coupling via insertion of sulfur dioxide: A novel and regioselective approach for the synthesis of sulfur-containing compounds
A novel and regioselective protocol for CS coupling of naphthylamines via the insertion of sulfur dioxide was developed by employing a heterogeneous copper catalyst, providing desired products in moderate to good yields. This strategy gives a powerful tool for the efficient preparation of sulfur-containing compounds. Control experiments declared that a single-electron transfer mechanism (SET) is responsible
A highly efficient method to selectively install alkoxy onto the para position of arylamines via a coordinatingactivation strategy has been reported. Various substrates are compatible, providing the corresponding products in good to excellent yields. This strategy gives an efficient and practical solution for the synthesis of unsymmetrical aryl ethers. A free radical pathway mechanism is advised for
Transition-metal free oxidative C–H etherification of acylanilines with alcohols through a radical pathway
作者:Xiaobo Xu、Zhengzhou Chu、Chengcai Xia
DOI:10.1039/c9ob01224a
日期:——
for the synthesis of methyl/ethyl aryl ether via oxidative C-H etherification of acylanilines with alcohols has been developed. Various acylanilines are compatible under standard conditions, giving the corresponding products in moderate to good yields. This strategy avoids transition-metal catalyst and excessive alcohol, providing a simple and reliable alternative method for the synthesis of methyl/ethyl
picolinamide-directed C–H thiolation of naphthylamine derivatives with diaryl disulfides has been developed to provide a convenientroute to 8-sulfenyl-1-naphthylamines. The reaction proceeds via a 5-membered palladacycle intermediates to afford the peri-thiolated products exclusively, in contrast to the conventional ortho-functionalization. Moreover, the related direct selenation was also achieved with diaryl