A-420983

N-[4-[4-氨基-1-[转-4-(4-甲基哌嗪-1-基)环己基]-1H-吡喰唑[3,4-d]嘧啶-3-基]-2-甲氧基苯基]-1-甲基-1H-吲哚-2-羧酰胺Chemical Name: N-[4-[4-Amino-1-[trans-4-(4-methylpiperazin-1-yl)cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidin-3-yl]-2-methoxyphenyl]-1-methyl-1H-indole-2-carboxamide
CAS No. 330789-03-2, 330788-65-3 (cis-isomer), 330789-04-3 (maleate)
项目整合开发状态: Preclinical
项目研究机构: Abbott (Originator)
合成路线:4-Phenoxybenzoic acid (I) is chlorinated with SOCl2,and the resultant acid chloride (II) is then condensed with malononitrile to produce the hydroxybenzylidene malononitrile (III).Subsequent methylation of (III) with trimethylsilyl diazomethane yields the methyl ether (IV),which is cyclized to pyrazole (V) upon treatment with hydrazine hydrate in boiling EtOH.Reaction of the 3-amino-4-cyanopyrazole (V) with hot formamide then produces the key pyrazolopyrimidine intermediate (VI).

合成路线:Reduction of 1,4-cyclohexanedione mono-ethylene ketal (VII) with NaBH4 gives alcohol (VIII).This is then coupled with the pyrazolopyrimidine (VI) under Mitsunobu conditions to afford adduct (IX).Subsequent acidic ketal hydrolysis in (IX) leads to ketone (X).Finally,reductive condensation of (X) with N-methylpiperazine (XI) in the presence of NaBH(OAc)3 produces a mixture of cis and trans disubstituted cyclohexanes,from which the title trans isomer is isolated by flash column chromatography.

合成路线:Treatment of 3-aminopyrazole-4-carbonitrile (I) with formamide at 180 C gives rise to the pyrazolopyrimidinyl amine (II).Subsequent iodination of (II) with N-iodosuccinimide in hot DMF affords 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-ylamine (III).Reduction of 1,4-cyclohexanedione mono-ethylene ketal (IV) with NaBH4 furnishes alcohol (V).This is then subjected to Mitsunobu coupling with the pyrazolopyrimidine (III) to produce adduct (VI).Acidic hydrolysis of the ethylene ketal (VI) leads to the cyclohexanone (VII).The reductive amination of ketone (VII) with N-methylpiperazine (VIII),either employing NaBH(OAc)3 or via condensation in hot NMP,and then reduction of the resultant enamine with formic acid,produces a mixture of trans- (IX) and cis- (X) disubstituted cyclohexanes,with different ratios in each case.

合成路线:Suzuki coupling between the pyrazolopyrimidinyl iodide (IX) and the pinacol arylboronate derivative (XI) provides the 3-aryl pyrazolopyrimidine (XII).The N-Boc protecting group of (XII) is then removed under acidic conditions to give aniline (XIII).Acid chloride (XV),prepared by chlorination of 1-methyl-2-indolecarboxylic acid (XIV) is finally coupled to aniline (XIII) to furnish the title amide.