Base-Induced Cyclisation of ortho-Substituted 2-Phenyloxazolines to Give 3-Aminobenzofurans and Related Heterocycles
作者:R. Aitken、Andrew Harper、Alexandra Slawin
DOI:10.1055/s-0036-1588503
日期:2017.9
butyllithium and potassium tert-butoxide results in cyclisation with ring opening of the oxazoline to give 2-aryl-3-aminobenzofurans. The reaction also occurs with the corresponding benzylthio and benzylamino compounds to give benzothiophenes and indoles, respectively. Use of an ortho-allyloxyphenyloxazoline gives the corresponding 2-vinylbenzofuran, while both α-methylbenzyloxy and benzylsulfonyl compounds