Convenient one-pot method for the preparation of polysubstituted benzo[b]- and naphtho[1,2-b]-furans and -thiophenes
作者:Alan R. Katritzky、Larisa Serdyuk、Linghong Xie
DOI:10.1039/a708809d
日期:——
N-(Phenoxymethyl)- and N-(phenylthiomethyl)-benzotriazoles are versatile substrates for the preparation of benzofurans and benzothiophenes by insertion reactions of their anions into alkyl and aryl aldehydes and in situ cyclization of the α-aryloxy and α-arylthio ketones thus formed. N-(Naphthyloxy)- and N-(naphthylthio)-benzotriazoles are similarly efficient precursors for naphthofurans and naphthothiophenes.
N-(苯氧甲基)-和N-(苯硫甲基)-苯噁唑是制备苯并呋喃和苯并硫噁唑的多功能底物,通过其阴离子与烷基和芳基醛的插入反应,以及由此形成的α-芳氧和α-芳硫酮的原位环化。N-(萘氧)-和N-(萘硫)-苯噁唑同样是高效的萘并呋喃和萘并硫噁唑的前体。