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Quinazolyl-2-guanidines in Alkylation and Acylation Reactions.-Alkylation as well as acylation of quinazolyl-2-guanidines (I) proceeds selectively at the guanidine moiety to afford the N-alkyl(acyl) derivatives (III) and (V), resp., which exist as amine-imine tautomers. In the presence of excess acylating agent, a diacylation is observed furnishing compounds (VI). -(SHIKHALIYEV, KH. S.; FALALEYEV, A. V.; YERMOLOVA, G. I.; SOLOVYOVA, A. S.; Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol. 41 (1998) 4, 116-119; Voronezhskii gos. univ., Voronezh, Russia; RU)

6-Hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline in the Sulfonylation Reaction.-Reaction of the title hydroxyquinoline derivative (I) with equimolar amounts of arylsulfonyl chlorides (II) proceeds in the presence of Et 3 N exclusively at the hydroxy group, while N-sulfonylation is preferred in the presence of the weaker base pyridine. -(SHIKHALIYEV, KH. S.; MEDVEDEVA, S. M.; YERMOLOVA, G. I.; SOLOVYOV, A. S.; Izv. Vyssh.

Syntheses Based on 6-Formyl-2,2,4-trimethyldihydroquinolines.-Condensation of 6-formylhydroquinolines such as (I) with amines and the N-heterocycles thiohydantoin as well as rhodanine affords the corresponding azomethines (III) and hetarylidenes (V), respectively. -(SHIKHALIYEV, KH. S.; KRYSIN, M. Y.; MEDVEDEVA, S. M.; SOLOV'EV, A. S.; Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol. 43 (2000) 2, 95-98; Voronezhskii gos. univ., Voronezh, Russia; RU)