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zhouxr
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CAS Registry Number: 22281-33-0 C19 H18 Cl N3 O3 Pyrimido[4,5-b]quinoline-2,4,6(1H,3H,7H)-trione, 5-(4-chlorophenyl)-5,8,9,10-tetrahydro-8,8-dimethyl- 1. Rapid and efficient synthesis of fused heterocyclic pyrimidines under ultrasonic irradiation By Mosslemin, Mohammad Hossein; Nateghi, Mohammad Reza From Ultrasonics Sonochemistry (2009), Volume Date 2010, 17(1), 162-167. Language: English, Database: CAPLUS Some fused heterocyclic pyrimidines have been synthesized in high yields using ultrasound irradn. in a one-pot, three-component and efficient process by condensation reaction of barbituric acids, aldehydes and a series of enamines in water. Prominent among the advantages of this new method are operational simplicity, good yields in short reaction times and easy work-up procedures employed. 2. Condensation of arylidenebarbituric acids with 3-amino-5,5-dimethyl-2-cyclohexen-1-one By Pelcere, J.; Grinsteins, E.; Stankevich, E. I.; Vanags, G. Edited by Hillers, S From Khim. Geterotsikl. Soedin., Sb. 1: Azotsoderzhashchie Geterotsikly (1967), 406-10. Language: Russian, Database: CAPLUS To find new physiol. active compds., the title condensation was carried out, and thus were obtained 2,4,6-trioxo-5-[p-(R-substituted)-phenyl] -8,8 - dimethyl - 2 - (R1-substituted) - 1,2,3,4,5,6,7,8,9,10 -decahydropyrimido[4,5 - b]-quinolines (I). Thus, benzalbarbituric acid was refluxed with 3-amino-5,5-dimethyl-2-cyclohexen-1-one in AcOH 2 hrs. to give 64% I (R = R1 = H) (Ia), m. 335-7¡ã (decompn.), also prepd. in 71% yield by condensation of 4-aminouracil, demidone, and BzH as above. Na salt m. 350¡ã. Also were prepd. by the 1st method the following I [R, R1, m.p. (decompn.), and % yield g... |
3Â¥2011-10-01 23:29:43
zhouxr
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4Â¥2011-10-06 08:23:24
karl2100: ÇëÎð»Ø¸´´¿±íÇéÌû£¬Ð»Ð»£¡ 2011-10-16 23:15:53
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5Â¥2011-10-16 23:11:31
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6Â¥2011-10-16 23:13:13














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