作者:V. I. Terenin、M. A. Butkevich、A. S. Ivanov、E. V. Kabanova
DOI:10.1007/s10593-008-0026-4
日期:2008.2
The acylation of pyrrolo[1,2-a]pyrazines with acetic anhydride and the acid chlorides of various carboxylic acids has been studied. It has been shown that pyrrole[1,2-a]pyrazines are selectively acylated at the alpha-position of the pyrrole ring when it is free. Products of the condensation of 1-methylsubstituted pyrrolo[1,2-a]pyrazines have been obtained for the first time in the process of acetylation.
Formylation of pyrrolo-[1,2-a]pyrazines
作者:V. I. Terenin、M. A. Butkevich、A. S. Ivanov、N. A. Tselischeva、E. V. Kabanova
DOI:10.1007/s10593-008-0010-z
日期:2008.1
The formylation of pyrrolo[1,2-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)pyrrolo[1,2-a]pyrazine occurs selectively at the alpha-position of the pyrrole ring. In all of the remaining examples the reaction course depends on substituent, reagent ratio, and reaction time.