|
【结 构 式】 
|
【分子编号】43247 【品名】benzyl (3S)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-ylcarbamate 【CA登记号】 |
【 分 子 式 】C17H16N2O3S 【 分 子 量 】328.39172 【元素组成】C 62.18% H 4.91% N 8.53% O 14.62% S 9.76% |
合成路线1
该中间体在本合成路线中的序号：(VII)o-Fluoronitrobenzene (I) is converted into (III) by an aromatic nucleophilic substitution with N-Ac-Cysteine (II) in EtOH in the presence of NaHCO3. Derivative (III) is then deacetylated by means of H2SO4 and NH4OH and reprotected as its Z-form by reaction with (IV) in the presence of NaOH to provide (V). Reduction of the nitro moiety of (V) with Zn in MeOH and in the presence of NH4Cl affords amine (VI), which is then converted into lactam (VII) using 1-[3-(dimethylamino)propyl]-3-ethyl carbodiimide (DEC) hydrochloride in DMF. The next step is alkylation of (VII) with ethyl bromoacetate (VIII) in THF in the presence of KOH and n-Bu4NBr to give (IX) (Scheme 28946801a).
| 【1】 Slade, J.; Mazzegna, G.C.; Ben-David, D.; Stanton, J.L.; Angiotensin Converting Enzyme Inhibitors: 1,5-Benzothiazepine Derivatives. J Med Chem 1985, 28, 1517-1521. |
| 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) | 13463 | o-Fluoronitrobenzene; 1-fluoro-2-nitrobenzene | 1493-27-2 | C6H4FNO2 | 详情 | 详情 |
| (II) | 39365 | (2S)-2-(acetamido)-3-sulfanylpropionic acid | 616-91-1 | C5H9NO3S | 详情 | 详情 |
| (III) | 43244 | (2S)-2-(acetamido)-3-[(2-nitrophenyl)sulfanyl]propionic acid | C11H12N2O5S | 详情 | 详情 | |
| (IV) | 10101 | Benzyloxycarbonyl chloride; Benzyl chloroformate; 1-[[(Chlorocarbonyl)oxy]methyl]benzene | 501-53-1 | C8H7ClO2 | 详情 | 详情 |
| (V) | 43245 | (2S)-2-[[(benzyloxy)carbonyl]amino]-3-[(2-nitrophenyl)sulfanyl]propionic acid | C17H16N2O6S | 详情 | 详情 | |
| (VI) | 43246 | (2S)-3-[(2-aminophenyl)sulfanyl]-2-[[(benzyloxy)carbonyl]amino]propionic acid | C17H18N2O4S | 详情 | 详情 | |
| (VII) | 43247 | benzyl (3S)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-ylcarbamate | C17H16N2O3S | 详情 | 详情 | |
| (VIII) | 16640 | Ethyl 2-bromoacetate; Ethyl bromoacetate | 105-36-2 | C4H7BrO2 | 详情 | 详情 |
| (IX) | 43248 | ethyl 2-[(3S)-3-[[(benzyloxy)carbonyl]amino]-4-oxo-3,4-dihydro-1,5-benzothiazepin-5(2H)-yl]acetate | C21H22N2O5S | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(VII)Aromatic nucleophilic substitution of o-fluoronitrobenzene (I) with N-Ac-cysteine (II) in EtOH in the presence of NaHCO3 yields (III). Derivative (III) is then deacetylated by means of H2SO4 and NH4OH and reprotected as its Z-form by reaction with (IV) in the presence of NaOH to provide (V). Reduction of the nitro moiety of (V) with Zn in MeOH and the presence of NH4Cl affords amine (VI), which is then converted into lactam (VII) using 1-[3-(dimethylamino)propyl]-3-ethyl carbodiimide (DEC) hydrochloride in DMF. The next step is alkylation of (VII) with ethyl bromoacetate (VIII) in THF in the presence of KOH and n-Bu4NBr to give (IX) (1) (Scheme 28947001a). Cleavage of both the Z protecting group and ethyl ester of derivative (IX) with HBr in AcOH, followed by introduction of a Boc group by treatment with Boc2O in dioxane in the presence of NaOH, affords (X), which is then anchored to the resin via its Cs salt to yield (XI). Deprotection of the amine moiety of (XI) with TFA in the presence of EDT as a scavenger, followed by coupling with Boc-Ser(Bzl)-OH in the presence of BOP and DIEA, affords (XII). The peptidic chain is then elongated by successive deprotection with TFA/EDT and coupling of protected amino acids (Boc-Igl-OH, Boc-Gly-OH, Boc-Hyp-OH, Boc-Pro-OH, Boc Arg(Tos)-OH, Boc-Lys(COOCH2Ph)-OH (x2)) with BOP/DIEA, providing derivative (XIV), which is finally deprotected and cleaved by a first treatment with TFA/EDT followed by HF in the presence of anisole (2,3) (Scheme 28947001[b-d]).
| 【1】 Slade, J.; Mazzegna, G.C.; Ben-David, D.; Stanton, J.L.; Angiotensin Converting Enzyme Inhibitors: 1,5-Benzothiazepine Derivatives. J Med Chem 1985, 28, 1517-1521. |
| 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) | 13463 | o-Fluoronitrobenzene; 1-fluoro-2-nitrobenzene | 1493-27-2 | C6H4FNO2 | 详情 | 详情 |
| (II) | 39365 | (2S)-2-(acetamido)-3-sulfanylpropionic acid | 616-91-1 | C5H9NO3S | 详情 | 详情 |
| (III) | 43244 | (2S)-2-(acetamido)-3-[(2-nitrophenyl)sulfanyl]propionic acid | C11H12N2O5S | 详情 | 详情 | |
| (IV) | 10101 | Benzyloxycarbonyl chloride; Benzyl chloroformate; 1-[[(Chlorocarbonyl)oxy]methyl]benzene | 501-53-1 | C8H7ClO2 | 详情 | 详情 |
| (V) | 43245 | (2S)-2-[[(benzyloxy)carbonyl]amino]-3-[(2-nitrophenyl)sulfanyl]propionic acid | C17H16N2O6S | 详情 | 详情 | |
| (VI) | 43246 | (2S)-3-[(2-aminophenyl)sulfanyl]-2-[[(benzyloxy)carbonyl]amino]propionic acid | C17H18N2O4S | 详情 | 详情 | |
| (VII) | 43247 | benzyl (3S)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-ylcarbamate | C17H16N2O3S | 详情 | 详情 | |
| (VIII) | 16640 | Ethyl 2-bromoacetate; Ethyl bromoacetate | 105-36-2 | C4H7BrO2 | 详情 | 详情 |
| (IX) | 43248 | ethyl 2-[(3S)-3-[[(benzyloxy)carbonyl]amino]-4-oxo-3,4-dihydro-1,5-benzothiazepin-5(2H)-yl]acetate | C21H22N2O5S | 详情 | 详情 |