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【结 构 式】

【分子编号】61820

【品名】methyl (2S)-2-[(tert-butoxycarbonyl)amino]-3-[4-(methoxymethoxy)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]propanoate

【CA登记号】

【 分 子 式 】C23H36BNO8

【 分 子 量 】465.35178

【元素组成】C 59.36% H 7.8% B 2.32% N 3.01% O 27.51%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(X)

The reaction of N-(benzyloxycarbonyl)-L-serine methyl ester (I) with 2-mercaptobenzothiazole (II) by means of DIAD and PPh3 in THF gives the thioether (III), which is reduced with NaBH4 and CaCl2 in THF to yield the alcohol (IV). The cyclization of (IV) with 2,2-dimethoxypropane (V) by means of TsOH in dichloromethane affords the oxazolidine (VI), which is oxidized at the thioether group by means of Mo7O24(NH4)6 and H2O2 in ethanol to provide the sulfone (VII). The condensation of (VII) with 7-iodoisatin (VIII) employing LiHMDS and DMPU in THF gives the adduct (IX), which is condensed with the boronic ester (X) -obtained by reaction of the tyrosine derivative (XI) with bis(pinacolato)diboron, KOH and Pd(dppf)Cl2 in hot DMSO- by means of K2CO3 and Pd(dppf)Cl2 in aqueous DME to yield the coupled product (XII). The hydrolysis of the ester group of (XII) with LiOH, followed by condensation with asparagine benzyl ester (XIII) by means of HOAT, EDC and NMM in dichloromethane affords the amide (XIV). This is oxidized at its exocyclic double bond by means of OsO4 and pyridine in THF/methanol to provide the diol (XV).

1 Albrecht, B.K.; Williams, R.M.; A concise formal total synthesis of TMC-95A/B proteasome inhibitors. Org Lett 2003, 5, 2, 197.
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) 51660 methyl (2S)-2-[[(benzyloxy)carbonyl]amino]-3-hydroxypropanoate C12H15NO5 详情 详情
(II) 24677 1,3-benzothiazol-2-ylhydrosulfide 149-30-4 C7H5NS2 详情 详情
(III) 61814 methyl (2R)-3-(1,3-benzothiazol-2-ylsulfanyl)-2-{[(benzyloxy)carbonyl]amino}propanoate C19H18N2O4S2 详情 详情
(IV) 61815 benzyl (1R)-2-(1,3-benzothiazol-2-ylsulfanyl)-1-(hydroxymethyl)ethylcarbamate C18H18N2O3S2 详情 详情
(V) 10722 1-Methoxy-1-methylethyl methyl ether; 2,2-Dimethoxypropane 77-76-9 C5H12O2 详情 详情
(VI) 61816 benzyl (4S)-4-[2-(1,3-benzothiazol-2-ylsulfanyl)ethyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate C22H24N2O3S2 详情 详情
(VII) 61817 benzyl (4S)-4-[2-(1,3-benzothiazol-2-ylsulfonyl)ethyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate C22H24N2O5S2 详情 详情
(VIII) 61824 7-iodo-1H-indole-2,3-dione C8H4INO2 详情 详情
(IX) 61818 benzyl (4S)-4-[(7-iodo-2-oxo-1,2-dihydro-3H-indol-3-ylidene)methyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate C22H21IN2O4 详情 详情
(X) 61820 methyl (2S)-2-[(tert-butoxycarbonyl)amino]-3-[4-(methoxymethoxy)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]propanoate C23H36BNO8 详情 详情
(XI) 61819 methyl (2S)-2-[(tert-butoxycarbonyl)amino]-3-[3-iodo-4-(methoxymethoxy)phenyl]propanoate C17H24INO6 详情 详情
(XII) 61821 benzyl (4S)-4-({7-[5-{(2S)-2-[(tert-butoxycarbonyl)amino]-3-methoxy-3-oxopropyl}-2-(methoxymethoxy)phenyl]-2-oxo-1,2-dihydro-3H-indol-3-ylidene}methyl)-2,2-dimethyl-1,3-oxazolidine-3-carboxylate C39H45N3O10 详情 详情
(XIII) 61825 benzyl (2S)-2,4-diamino-4-oxobutanoate C11H14N2O3 详情 详情
(XIV) 61822 benzyl (4S)-4-({7-[5-{(2S)-3-({(1S)-3-amino-1-[(benzyloxy)carbonyl]-3-oxopropyl}amino)-2-[(tert-butoxycarbonyl)amino]-3-oxopropyl}-2-(methoxymethoxy)phenyl]-2-oxo-1,2-dihydro-3H-indol-3-ylidene}methyl)-2,2-dimethyl-1,3-oxazolidine-3-carboxylate C49H55N5O12 详情 详情
(XV) 61823 benzyl (4R)-4-[(R)-{(3S)-7-[5-{(2S)-3-({(1S)-3-amino-1-[(benzyloxy)carbonyl]-3-oxopropyl}amino)-2-[(tert-butoxycarbonyl)amino]-3-oxopropyl}-2-(methoxymethoxy)phenyl]-3-hydroxy-2-oxo-2,3-dihydro-1H-indol-3-yl}(hydroxy)methyl]-2,2-dimethyl-1,3-oxazoli C49H57N5O14 详情 详情
Extended Information