Download (4Mb) - Etheses - Saurashtra University

Part-IResults and Discussion1 HNMR (DMSO-d 6 )δppm: 1.83-1.88 (4H, m, CH 2 at 6 & 7), 2.76 (2H, t, CH 2 at 5, J =5.64), 2.95 (2H, t, CH 2 at 8, J = 5.80), 4.39 (2H, s, CH 2 at SCH 2 ), 7.39-7.16 (4H, m, Ar-H), 12.50 (1H, s, NH), 13.17 (1H, s, NH).Specimen Mass spectrum of condesed derivatives of substituted 2-chloro-methylthienopyrimidinesand 2-mercaptobenzimidazoles.3. Mass spectrum of 2-(1H-benzimidazol-2-yl)methylthio-5,6,7,8-tetrahydrobenzo(b)-thieno[2,3-d]pyrimidin-4-(3H)-one (IIIi)ONHSNSNC 18H 16N 4OS 2Mol. Wt.: 368.48HNMS m/e: 368(M + ), 335, 307, 150.3.5.3 Spectral discussion of 5,6-disubstituted-2-((1H-benzo[d]imidazol-2-ylsulfinyl)methyl)thieno[2,3-d]pyrimidin-4(3H)-ones (IVi-xxxv)The selective oxidised products of 2-((5-methoxy-1H-benzo[d]imidazol-2-ylthio)methyl)thieno[2,3-d]pyrimidin-4(3H)-one are colorless to buff white colored solid,with the exception of IVxxi which is slightly orange colored solid with much lowermelting points then the corresponding thio derivatives. However, melting point of someof the product is higher than the thio derivatives. These compounds are soluble inmixture of MDC/methanol and chloroform/methanol, practically insoluble in ethanol,methanol and hexane (Table-10).108