OXIDATIVE CYCLIZATION OF 6-AMINO-5-BENZYLIDENEAMINO-1,3-DIMETHYLURACILS WITH THIONYL CHLORIDE. A CONVENIENT SYNTHESIS OF 8-SUBSTITUTED THEOPHYLLINES.SENGA K; SHIMIZU K; NISHIGAKI S et al.1977; CHEM. PHARM. BULL.; JAP.; DA. 1977; VOL. 25; NO 3; PP. 495-497; BIBL. 9 REF.Article

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SYNTHESIS OF XANTHINES BY DEHYDROGENATIVE CYCLIZATION OF 6-AMINO-5-BENZYLIDENEAMINOURACILS WITH DIETHYL AZODICARBOXYLATEYONEDA F; HIGUCHI M; MORI K et al.1978; CHEM. PHARM. BULL.; JPN; DA. 1978; VOL. 26; NO 9; PP. 2905-2910; BIBL. 36 REF.Article