HCID 62440092, compound → HCID 25112244, compound

Participants

Reaction Steps

-nitrocinnamic acid (7) is reacted with methanol under acid catalyst to give methyl 2-nitrocinnamate (8), of which the nitro group is reduced preferably with SnCl22H2O to provide methyl 2-aminocinnamate (9). The compound (9) is reacted with triphenylphosphine, preferably in the presence of hexachloroethane and triethylamine to give methyl 3-[2-(triphenylphosphineimino)phenyl]acrylate (10). The compound (10) is reacted with 4-biphenylyl isocyanate in a suitable solvent to give methyl 3-[2-(4-biphenylyliminomethyleneamino)phenyl]acrylate (11). Then, the compound (11) is reacted with N-methyl-N-[5-(pyrrolidin-1-yl)pentyl]amine (6) obtained according to the above Reaction Scheme 1 in a suitable solvent to give 3-(4-biphenylyl)-2-[N-methyl-N-(5-pyrrolidin-1-ylpentyl)amino]-4-methoxycarbonylmethyl-3,4-dihydroquinazoline (12). This compound (12) is hydrolyzed preferably using LiOH/H2O to provide compound (13), which is reacted with benzylamine, preferably in the presence of 1-hydroxybenzotriazole (HOBT) and 1-[3-(dimethylamine)propyl]-3-ethylcarbodiimide hydrochloric acid (EDC) to give 4-(N-benzylacetamino)-3-(4-biphenylyl)-2- [N-(5-pyrrolidin-1-ylpentyl)-N-methylamino]-3,4-dihydroquinazoline (14).

Provenance & Evidence