ChemInform Abstract: Regiospecific Formations of Thieno(3,2‐a)indolizine and Thieno(2,3‐b)indolizine Derivatives.

Abstract The pyridinium ylides (I) are coupled with the bromides (II) to give the pyridinium bromides (III) which are consecutively cyclized with DBU and oxidized with DDQ, producing the indolizines (IV).