Dichloromethane → (7R)-2-chloro-8-(1-cyclopropylethyl)-7-ethyl-5-methyl-7,8-dihydropteridin-6(5H)-one

Participants

Reaction Steps

Intermediate SS is prepared from compound I-SS via compound II-SS, III-SS and IV-SS similarly to the methods used in preparing compound III-J, Intermediate J-1, compound IV-J and Intermediate J as described above, with (R)-methyl 2-aminobutanoate hydrochloride used instead of (R)-methyl 2-aminobutanoate and with cyclopropylethanone instead of dihydro-2H-pyran-4(3H)-one in the first step, and with PE/dichloromethane instead of PE/1,2-dichloroethane as solvent in the coupling of 2,4-dichloro-5-nitropyrimidine with compound II-SS. Compound III-SS; LCMS: 343.1 m/z (M+H)+. Compound IV-SS; LCMS: 281.1 m/z (M+H)+. Intermediate SS. LCMS: 295 m/z (M+H)+.

Provenance & Evidence