4-Methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-amine → HCID 13068372, compound
Reaction equation
[CH3:1][C:2]1[C:7]2[CH2:8][CH2:9][CH2:10][C:6]=2[N:5]=[C:4]([NH2:11])[N:3]=1.[N+:12]([C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=1[S:21]([N:24]=[C:25]=[O:26])(=[O:23])=[O:22])([O-:14])=[O:13]>C(Cl)Cl>[CH3:1][C:2]1[C:7]2[CH2:8][CH2:9][CH2:10][C:6]=2[N:5]=[C:4]([NH:11][C:25]([NH:24][S:21]([C:16]2[CH:17]=[CH:18][CH:19]=[CH:20][C:15]=2[N+:12]([O-:14])=[O:13])(=[O:22])=[O:23])=[O:26])[N:3]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
To a dry, stirred solution of 10 g of 6,7-dihydro-4-methyl-5H-cyclopentapyrimidin-2-amine in 800 ml of methylene chloride at ambient temperature and pressure was added 14.9 g of 2-nitrobenzenesulfonylisocyanate. The resulting mixture was stirred at reflux temperature (42°) for 2 hours after which the methylene chloride was removed under reduced pressure. The resulting solid was triturated with methanol or 1-chlorobutane and filtered to yield 15 g of N-[(6,7-dihydro-4-methyl-5H-cyclopentapyrimidin-2-yl)aminocarbonyl]-2-nitrobenzene-sulfonamide, m.p. 202°-205°. The product showed characteristic absorption bands in the infrared spectrum at 1675 cm-1 and at 1.7, 3.2 and 7.7 to 8.5 ppms by nuclear magnetic resonance spectrum (60 MHz), indicating the title compound.