Tetrahydrofuran → HCID 13983228, compound

Participants

Reaction Steps

To a stirred mixture of 7.7 parts of 2-(ethylamino)-N-[2-[4-[[1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-yl]amino]-1-piperidinyl]ethyl]benzamide, 2 parts of N,N-diethylethanamine and 90 parts of tetrahydrofuran were added dropwise 1.6 parts of ethyl carbonochloridate. Upon completion, stirring was continued for 1 hour at room temperature. The reaction mixture was evaporated and 4-methyl-2-pentanone was added to the residue. The organic phase was washed with water, dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (90:10 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was further purified by HPLC using a mixture of methylbenzene and ethanol (90:10 by volume) as eluent. The pure fraction was collected and the eluent was evaporated. the residue was crystallized from acetonitrile, yielding 2.2 parts (25%) of ethyl [1-[2-[1-ethyl-1,4-dihydro-2,4-dioxo-3(2H)-quinazolinyl]ethyl]-4-piperidinyl]-[1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-yl]carbamate; mp. 160.3° C. (compound 124).

Provenance & Evidence