Reference

Acid-catalyzed photoreaction of 6-chloro-1,3-dimethyluracil in frozen benzene: formation of novel cycloadducts, tetrahydropentaleno[1,2-e]pyrimidine-2,4-dione derivatives

Acid-catalyzed photoreaction of 6-chloro-1,3-dimethyluracil in frozen benzene: formation of novel cycloadducts, tetrahydropentaleno[1,2-e]pyrimidine-2,4-dione derivatives. Ohkura, Kazue; Noguchi, Yukari; Seki, Koh-ichi (Fac. Pharmaceuutical Sci., Health Sci. Univ., Hokkaido 061-02, Japan). Chemistry Letters, (1), 99-100 (English) 1997 Nippon Kagakkai. CODEN: CMLTAG. ISSN: 0366-7022. DOCUMENT TYPE: Journal CA Section: 26 (Biomolecules and Their Synthetic Analogs) In contrast to the photoreaction of 6-chloro-1,3-dimethyluracil in benzene at ambient temp. in the presence of trifluoroacetic acid, which gives 1,3-dimethylcycloctapyrimidine as the sole cycloadduct, the similar photoreaction in frozen benzene at -15 to -20°C proceeded quite differently to give three novel photocycloadducts, 7-chloro-1,3-dimethyl-4b,5,7a,8-tetrahydropentaleno[1,2-e]pyrimidine-2 ,4-dione, 5-chloro-1,3-dimethyl-4b,7,7a,8-tetrahydropentaleno[1,2-e]pyrimidine-2 ,4-dione, and 6-chloro-10,12-diazapentacyclo[6. 186393-38-4 and 6972-27-6 are also in the experiment.4.0.01,3.02,5.04,8]-dodecane-9,11-dio ne. .

Phase-transfer catalyzed preparation of 6-alkoxy and 6-thioalkoxy-1,3-dimethyluracils

Phase-transfer catalyzed preparation of 6-alkoxy and 6-thioalkoxy-1,3-dimethyluracils. Gogoi, Mukti; Sandhu, Jagir S.; Baruah, J. N. (Reg. Res. 6972-27-6 are also occured in this study. Lab., Jorhat 785 006, India). Indian J. Chem., Sect. B, 23B(9), 851-2 (English) 1984. CODEN: IJSBDB. ISSN: 0376-4699. DOCUMENT TYPE: Journal CA Section: 26 (Biomolecules and Their Synthetic Analogs) Reaction of 6-chloro-1,3-dimethyluracil with primary alcs. and EtSH under phase-transfer conditions affords the corresponding ethers I [R = OMe, OEt, OPr, O(CH2)4Me, allyloxy, OCH2Ph, SEt] in quant. yields. .