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Formylation of pyrrolo-[1,2-<Emphasis Type="Italic">a</Emphasis>]pyrazines
Authors:V I Terenin  M A Butkevich  A S Ivanov  N A Tselischeva  E V Kabanova
Institution:(1) M. V. Lomonosov Moscow State University, Moscow, 119992, Russian
Abstract:The formylation of pyrrolo1,2-a]pyrazines containing alkyl, aryl, or hetaryl substituents in positions 1 and 6 of the heterocycle has been studied. It has been shown that formylation of 1-phenyl-and 1-(2 thienyl)pyrrolo1,2-a]pyrazine occurs selectively at the α-position of the pyrrole ring. In all of the remaining examples the reaction course depends on substituent, reagent ratio, and reaction time. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 88–93, January, 2008.
Keywords:pyrrolo[1  2-a]pyrazine  formylation  electrophilic substitution  Vilsmeier-Haack reaction
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