Electrophilic substitution in benzo[b]thieno- and benzo[b]furo[2,3-c]pyridines. Use of the nuclear overhauser effect for determination of substitution position

The site of electrophilic substitution in benzob]thieno- and benzob]furo2,3-c]pyridines has been determined using the nuclear Overhauser effect and by a method based on the difference in reactivity of the isomeric products.L. M. Litvinenko Institute for Physicoorganic Chemistry and Carbon Chemistry. Ukrainian Academy of Sciences, Donetsk 340114. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1199–1202, September, 1997.