The results concerning the three-component reaction of phthalhydrazides (I) depend on the nature of the diester and the corresponding N-heterocycle. In the absence of quinoline, product (Va) is formed in trace amounts (reaction mechanism). -(GHAHREMANZADEH, R.; AHADI, S.; SAYYAFI, M.; BAZGIR*, A.; Tetrahedron Lett. 49 (2008) 29-30, 4479-4482; Dep. Chem., Shahid Beheshti Univ., Tehran, Iran; Eng.) -Mais 43-161
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