Efficient Access to 2-Aryl-3-Substituted Benzo[b]thiophenes
摘要:
Benzo[b]thiophene derivatives are important in part because of their use as selective estrogen receptor modulators. They are usually synthesized by intramolecular cyclization. Here, we propose a method for the synthesis of 2-arylbenzo[b]thiophenes with heteroatoms at the 3-positions directly from the benzo [b]thiophene core by using an aromatic nucleophilic substitution reaction and Heck-type coupling. This methodology provides 2-aryl-3-amino or phenoxybenzo[b]thiophenes in about 35% overall yield in 5 steps.
Efficient Access to 2-Aryl-3-Substituted Benzo[<i>b</i>]thiophenes
作者:Emilie David、Julie Perrin、Stéphane Pellet-Rostaing、Jérémie Fournier dit Chabert、Marc Lemaire
DOI:10.1021/jo0500378
日期:2005.4.1
Benzo[b]thiophene derivatives are important in part because of their use as selective estrogen receptor modulators. They are usually synthesized by intramolecular cyclization. Here, we propose a method for the synthesis of 2-arylbenzo[b]thiophenes with heteroatoms at the 3-positions directly from the benzo [b]thiophene core by using an aromatic nucleophilic substitution reaction and Heck-type coupling. This methodology provides 2-aryl-3-amino or phenoxybenzo[b]thiophenes in about 35% overall yield in 5 steps.
Cu/Fe/O=PPh<sub>3</sub>-Catalyzed Etherification for the Synthesis of Aryl 3-Benzo[<i>b</i>]thienyl Ethers
作者:Koichi Mitsudo、Takuya Asada、Tomohiro Inada、Yuji Kurimoto、Hiroki Mandai、Seiji Suga
DOI:10.1246/cl.180425
日期:2018.8.5
Cu/Fe-cocatalyzed cross-coupling reactions between 3-bromobenzo[b]thiophene and hydroxyaryls are described herein. The combination of Cu and Fe catalysts is important for the progress of the reacti...