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【结 构 式】

【药物名称】CGP-75355

【化学名称】N-(Methoxycarbonyl)-L-tert-leucine N2-(biphenyl-4-ylmethyl)-N2-[2(S)-hydroxy-3(S)-[N-(methoxycarbonyl)-L-tert-leucylamino]-4-phenylbutyl]hydrazide

【CA登记号】191594-64-6

【 分 子 式 】C39H53N5O7

【 分 子 量 】703.88656

【开发单位】Novartis (Originator)

【药理作用】AIDS Medicines, Anti-HIV Agents, ANTIINFECTIVE THERAPY, HIV Protease Inhibitors

合成路线1

Condensation of N-Boc-L-phenylalaninal (I) with 4-biphenylcarbonyl chloride (II) and KCN in the presence of N-benzylcinchoninium chloride (NBC) afforded alpha-acyloxynitrile (III) as a 4:1 mixture of (2R,3S) and (2S,3S) isomers. Hydrogenation of (III) in the presence of Raney Nickel and tert-butyl carbazate, followed by crystallization of the major isomer from acetonitrile provided hydrazone (IV). Subsequent reduction of (IV) to hydrazine using NaBH3CN and p-toluenesulfonic acid, with concomitant rearrangement of the biphenylcarbonyl group furnished hydrazide (V), which was reduced to the benzyl hydrazine (VI) by means of either BH3 or DIBAL-H. Deprotection of both Boc groups of (VI) with HCl gave diamino compound (VII). Finally, coupling of N-methoxycarbonyl-L-tert-leucine (IX), (prepared by reaction of tert-leucine (VIII) with methyl chloroformate), with diamine (VII) employing O-(1,2-dihydro-2-oxo-1-pyridyl)-N,N,N',N'-tetramethyluronium tetra-fluoroborate (TPTU) provided the target bisamide.

1 Fassler, A.; Bold, G.; Capraro, H.-G.; Lang, M. (Novartis AG); Azahexane derivs. as substrate isosters of retroviral asparate proteases. EP 0876336; JP 1999514996; WO 9719055 .
2 Fassler, A.; Steiner, H.; Bold, G.; Capraro, H.-G. (Novartis AG); Process for the preparation of hydrazine derivs. useful as intermediates for the preparation of peptide analogues. WO 9746514 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 23452 tert-butyl (1S)-1-benzyl-2-oxoethylcarbamate C14H19NO3 详情 详情
(II) 28439 [1,1'-biphenyl]-4-carbonyl chloride 14002-51-8 C13H9ClO 详情 详情
(III) 28440 (2S)-2-[(tert-butoxycarbonyl)amino]-1-cyano-3-phenylpropyl [1,1'-biphenyl]-4-carboxylate C28H28N2O4 详情 详情
(IV) 28441 (1R,2S)-2-[(tert-butoxycarbonyl)amino]-1-[[(E)-2-(tert-butoxycarbonyl)hydrazono]methyl]-3-phenylpropyl [1,1'-biphenyl]-4-carboxylate C33H39N3O6 详情 详情
(V) 28442 tert-butyl 2-([1,1'-biphenyl]-4-ylcarbonyl)-2-[(2S,3S)-3-[(tert-butoxycarbonyl)amino]-2-hydroxy-4-phenylbutyl]-1-hydrazinecarboxylate C33H41N3O6 详情 详情
(VI) 28443 tert-butyl 2-([1,1'-biphenyl]-4-ylmethyl)-2-[(2S,3S)-3-[(tert-butoxycarbonyl)amino]-2-hydroxy-4-phenylbutyl]-1-hydrazinecarboxylate C33H43N3O5 详情 详情
(VII) 28444 (2S,3S)-3-amino-1-[1-([1,1'-biphenyl]-4-ylmethyl)hydrazino]-4-phenyl-2-butanol C23H27N3O 详情 详情
(VIII) 28445 (2S)-2-amino-3,3-dimethylbutyric acid C6H13NO2 详情 详情
(IX) 23447 (2S)-2-[(methoxycarbonyl)amino]-3,3-dimethylbutyric acid C8H15NO4 详情 详情

合成路线2

In an alternative procedure, condensation of 4-biphenylcarbaldehyde (X) with tert-butyl carbazate afforded hydrazone (XI), which was reduced to the benzylhydrazine (XII) by hydrogenation over Pd/C. Opening of the Boc-protected epoxide (XIII) with hydrazine (XII) gave hydrazinoalcohol (VI). This was deprotected with HCl and then coupled as above with N-methoxycarbonyl-L-tert-leucine (X) by means of TPTU.

1 New aza-dipeptide analogues as potent and orally a. J Med Chem 1998, 41, 18, 3387.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VI) 28443 tert-butyl 2-([1,1'-biphenyl]-4-ylmethyl)-2-[(2S,3S)-3-[(tert-butoxycarbonyl)amino]-2-hydroxy-4-phenylbutyl]-1-hydrazinecarboxylate C33H43N3O5 详情 详情
(IX) 23447 (2S)-2-[(methoxycarbonyl)amino]-3,3-dimethylbutyric acid C8H15NO4 详情 详情
(X) 28446 [1,1'-biphenyl]-4-carbaldehyde 3218-36-8 C13H10O 详情 详情
(XI) 28447 tert-butyl (Z)-2-([1,1'-biphenyl]-4-ylmethyl)-1-diazenecarboxylate C18H20N2O2 详情 详情
(XII) 28448 tert-butyl 2-([1,1'-biphenyl]-4-ylmethyl)-1-hydrazinecarboxylate C18H22N2O2 详情 详情
(XIII) 23444 tert-butyl (1S)-1-[(2R)oxiranyl]-2-phenylethylcarbamate C15H21NO3 详情 详情
Extended Information