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Part-IISynthesis of PyrimidinesTable 21: 2-Substituted thieno[2,3-d]pyrimidin-4(3H)-onesOR 2R 1SN NHRR 1 R 2 R Yield R. Solv. Reference(%)- (CH 2 ) 4 - -CH 3 85 E-D 24- (CH 2 ) 4 - -CH 2 CO 2 C 2 H 5 72 E 28- (CH 2 ) 4 - -CH 2 CONH 2 46 E-D 28- (CH 2 ) 4 - -CHClCH 2 Cl 40 Di 28- (CH 2 ) 4 - -CH 2 C 6 H 5 83 E-D 34- (CH 2 ) 4 - -CH 2 Cl 81 E-C 25- (CH 2 ) 4 - -CH 2 OC 6 H 4 Cl-4 75 D 34- (CH 2 ) 4 - -CH 2 SC 6 H 4 CH 3 -4 75 E-C 34- (CH 2 ) 4 - -CH 2 SO 2 C 6 H 4 CH 3 -4 58 E-C 34- (CH 2 ) 4 - -CH 2 CO 2 CH 3 66 E-C 34- (CH 2 ) 4 - -CH 2 NHSO 2 C 6 H 5 NH 2 -4 50 E 34- (CH 2 ) 4 - -CH 2 NHSO 2 C 6 H 4 NH- 58 E-C 34COCH 3 -4- (CH 2 ) 4 - -CH 2 SO 2 C 6 H 4 Cl-4 50 D 34- (CH 2 ) 4 - -CH 2 SC 6 H 4 Cl-4 70 E-C 34- (CH 2 ) 4 - -CH 2 SC 6 H 4 NO 2 -4 65 M-C 36- (CH 2 ) 4 - -CH 2 SO 2 C 6 H 4 NO 2 -4 63 D 36- (CH 2 ) 4 - -CH 2 NHSO 2 C 6 H 4 63 E-C 36- (CH 2 ) 4 - -CH 2 C 6 H 4 Cl-4 75 E 31- (CH 2 ) 4 - -CH 2 COC 6 H 5 62 Di 31- (CH 2 ) 4 - -CH 2 NHC 6 H 4 56 C-P 31- (CH 2 ) 4 - -CH 2 CH 2 Cl 50 E-C 31-(CH 2 ) 4 - -C 6 H 5 80 E-D 24- (CH 2 ) 4 - -C 6 H 4 Cl-4 66 E-D 31- (CH 2 ) 4 - 3-C 5 H 4 N 60 E-D 28- (CH 2 ) 4 - -CO 2 C 2 H 5 68 E-D 31- (CH 2 ) 4 - -SC 6 H 4 N(CH 3 ) 2 -4 56 E-C 37- (CH 2 ) 4 - -SC 10 H 6 OH-4 50 M-C 37- (CH 2 ) 4 - -SC 6 H 4 CH 3 -4 59 E-C 37- (CH 2 ) 4 - SC 2 H 5 64 E-C 37- (CH 2 ) 4 - -SC 3 H 7 6.9 E-C 37229