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。