A novel process for producing 5-[(substituted)amino]-8-[phenyl or substituted-phenyl]-3H,6H-1,4,5a,8a-tetraazaace-naphthylen-3-ones of the formula: ##STR1## Where R.sub.1, R.sub.2 and R.sub.3 are defined in the specification by reacting a 4,5-dihydro-7-[phenyl or substituted phenyl]pyrazolo[1,5-a]pyrimidine-3-carboxamide with carbon disulfide and a suitable base and a lower alkyl iodide to give a 5-(lower alkylthio)-8-[phenyl or substituted phenyl]-3H,6H-1,4,5a,8a-tetraazaacenaphthylen-3-one which is further reacted with an amine of the formula: ##STR2## to give the desired compounds is disclosed as well as 5-(loweralkylthio)-8-phenyl-3H,6H,1,4,5a,8a-tetra azaacenaphthylen-3-ones useful as intermediates in the process.
一种用于生产5-[(取代)
氨基]-8-[苯基或取代苯基]-3H,6H-1,4,5a,8a-四氮杂-3-酮的新型工艺已经公开,其
化学式为:其中R.sub.1、R.sub.2和R.sub.3在规范中被定义为通过将4,5-二氢-7-[苯基或取代苯基]
吡唑并[1,5-a]
嘧啶-3-羧酰胺与
二硫化碳和适当的碱以及低
碘烷基化合物反应来获得5-(低
碘烷基
硫基)-8-[苯基或取代苯基]-3H,6H-1,4,5a,8a-四氮杂-3-酮,然后进一步与
化学式为的胺反应以获得所需的化合物,同时还公开了作为该工艺中间体有用的5-(低
碘烷基
硫基)-8-苯基-3H,6H,1,4,5a,8a-四氮杂-3-酮。