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【结 构 式】 
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【分子编号】52962 【品名】(2R)-2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-4-({(2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutanoyl}oxy)butyl stearate 【CA登记号】 |
【 分 子 式 】C38H66N6O7 【 分 子 量 】718.97828 【元素组成】C 63.48% H 9.25% N 11.69% O 15.58% |
合成路线1
该中间体在本合成路线中的序号：(X)The precursor (R)-9-[4-hydroxy-2-(hydroxymethyl)]guanine (VI) was prepared by conjugate addition of dimethyl itaconate (II) to 2-amino-6-chloropurine (I), followed by reduction of the resultant diester (III) with LiBH4 to yield (IV). Subsequent displacement of the 6-chloro group of (IV) with ammonia under pressure furnished the racemic 2,6-diaminopurine (V). Then, enantioselective deamination of (V) in the presence of adenosine deaminase provided the target (R)-guanine derivative (VI). Esterification of the 4-hydroxy group of (VI) with N-Boc-L-valine (VII) by means of DCC gave the valine ester (VIII). The remaining free hydroxyl group of (VIII) was further esterified with stearoyl chloride (IX) in pyridine, yielding stearate (X). Finally, acid-promoted N-Boc group cleavage in (IX) furnished the title compound.
| 【1】 Engelhardt, P.; Hoberg, M.; Zhou, X.-X.; Lindborg, B.; Johansson, N.G. (Medivir AB); Acyclic nucleoside derivs.. EP 0888348; JP 2000504720; JP 2000504721; US 5869493; WO 9730051; WO 9730052 . |
| 【2】 Synthesis of acyclic nucleoside derivs.. WO 9834917 . |
| 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) | 11644 | 6-Chloro-9H-purin-2-amine; 6-Chloro-9H-purin-2-ylamine; 2-Amino-6-chloropurine | 10310-21-1 | C5H4ClN5 | 详情 | 详情 |
| (II) | 21416 | dimethyl 2-methylenesuccinate | 617-52-7 | C7H10O4 | 详情 | 详情 |
| (III) | 52956 | dimethyl 2-[(2-amino-6-chloro-9H-purin-9-yl)methyl]succinate | C12H14ClN5O4 | 详情 | 详情 | |
| (IV) | 52957 | 2-[(2-amino-6-chloro-9H-purin-9-yl)methyl]-1,4-butanediol | C10H14ClN5O2 | 详情 | 详情 | |
| (V) | 52958 | 2-[(2,6-diamino-9H-purin-9-yl)methyl]-1,4-butanediol | C10H16N6O2 | 详情 | 详情 | |
| (VI) | 52959 | 2-amino-9-[(2R)-4-hydroxy-2-(hydroxymethyl)butyl]-1,9-dihydro-6H-purin-6-one | C10H15N5O3 | 详情 | 详情 | |
| (VII) | 19733 | (2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutyric acid | C10H19NO4 | 详情 | 详情 | |
| (VIII) | 52960 | (3R)-4-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)-3-(hydroxymethyl)butyl (2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutanoate | C20H32N6O6 | 详情 | 详情 | |
| (IX) | 52961 | n-Octadecanoyl chloride; Octadecanoyl Chloride; Stearic acid chloride; Stearoyl chloride | 112-76-5 | C18H35ClO | 详情 | 详情 |
| (X) | 52962 | (2R)-2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-4-({(2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutanoyl}oxy)butyl stearate | C38H66N6O7 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(X)In an alternative method, (R)-9-[4-hydroxy-2-(hydroxymethyl)]guanine (VI) was selectively silylated at the 4-hydroxyl by means of tert-butyldiphenylsilyl chloride. The resultant mono-silylated compound (XIV) was acylated with stearoyl chloride (IX), producing stearate ester (XV). Desilylation of (XV) with tetrabutylammonium fluoride, followed by coupling with either N-Boc-L-valine (VII) or N-Cbz-L-valine (XVI), furnished the respective N-protected valyl esters (X) and (XIII). The title compound was then obtained by N-deprotection of (X) and (XIII) under acidic conditions or by catalytic hydrogenation, respectively.
| 【1】 Engelhardt, P.; Hoberg, M.; Zhou, X.-X.; Lindborg, B.; Johansson, N.G. (Medivir AB); Acyclic nucleoside derivs.. EP 0888348; JP 2000504720; JP 2000504721; US 5869493; WO 9730051; WO 9730052 . |
| 【2】 Synthesis of acyclic nucleoside derivs.. WO 9834917 . |
| 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) | 52959 | 2-amino-9-[(2R)-4-hydroxy-2-(hydroxymethyl)butyl]-1,9-dihydro-6H-purin-6-one | C10H15N5O3 | 详情 | 详情 | |
| (VII) | 19733 | (2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutyric acid | C10H19NO4 | 详情 | 详情 | |
| (IX) | 52961 | n-Octadecanoyl chloride; Octadecanoyl Chloride; Stearic acid chloride; Stearoyl chloride | 112-76-5 | C18H35ClO | 详情 | 详情 |
| (X) | 52962 | (2R)-2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-4-({(2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutanoyl}oxy)butyl stearate | C38H66N6O7 | 详情 | 详情 | |
| (XIII) | 52965 | (2R)-2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-4-[((2S)-2-{[(benzyloxy)carbonyl]amino}-3-methylbutanoyl)oxy]butyl stearate | C41H64N6O7 | 详情 | 详情 | |
| (XIV) | 52966 | 2-amino-9-[(2R)-4-{[tert-butyl(diphenyl)silyl]oxy}-2-(hydroxymethyl)butyl]-1,9-dihydro-6H-purin-6-one | C26H33N5O3Si | 详情 | 详情 | |
| (XV) | 52967 | (2R)-2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-4-{[tert-butyl(diphenyl)silyl]oxy}butyl stearate | C44H67N5O4Si | 详情 | 详情 | |
| (XVI) | 18092 | (2S)-2-[[(benzyloxy)carbonyl]amino]-3-methylbutyric acid | C13H17NO4 | 详情 | 详情 |