Tetrahedron Letters,Vo1.23,No.35,pp 3565-3566,1982 0040-4039/82/353565-02$03.00/o Printed in Great Britain ... UNE NOUVELLE REACTION DE CYCLISATION CONDUISANT A DES PYRROLO[1.2-a]PYRAZINES ... JP CORHETf, JM PARIS et C. COTREL ... RHONE-POULENC RECHERCHES Centre de Recherches Nicolas Grillet 13, quai Jules Guesde 94400 VITRY S/SEINE - FRANCE ... Summary : Reduction of 5-(2-pyrazinyl-1,2-dithiole-3-thiones by ...