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【结 构 式】 
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【分子编号】17734 【品名】tert-butyl 3-[[(tert-butoxycarbonyl)amino]methyl]-4-hydroxy-1-pyrrolidinecarboxylate 【CA登记号】 |
【 分 子 式 】C15H28N2O5 【 分 子 量 】316.3978 【元素组成】C 56.94% H 8.92% N 8.85% O 25.28% |
合成路线1
该中间体在本合成路线中的序号：(VI)The addition of glycine ethyl ester (I) to 2-propenenitrile (II) by means of KOH in water gives N-(2-cyanoethyl)glycine ethyl ester (III), which is cyclized by means of di-tert-butyl dicarbonate yielding the protected pyrrolidinone (IV). The reduction of (IV) with NaBH4 in ethanol affords the pyrrolidinol (V), which is further reduced with LiAlH4 in THF and protected with di-tert-butyl dicarbonate to give the fully N-protected compound (VI). The oxidation of (VI) with pyridine/SO3 complex yields the pyrrolidinone (VII), which is treated with O-methylhydroxylamine (VIII) to afford the correponding oxime (IX). The deprotection of (IX) with acetyl chloride in cool methanol gives 4-(aminomethyl)pyrrolidin-3-one O-methyloxime (X), which is finally condensed with 7-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid (XI) by means of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in acetonitrile.
| 【1】 Kim, Y.K.; Chang, J.H.; Choi, H.; Hong, C.Y.; Nam, D.H.; Kim, Y.Z.; Kim, S.H.; Kwak, J.H.; Novel fluoroquinolone antibacterial agents containing oxime-substituted (aminomethyl)pyrrolidines: Synthesis and antibacterial activity of LB20304. J Med Chem 1997, 40, 22, 3584-93. |
| 【2】 Graul, A.; Castañer, J.; SB-265805/LB-20304a. Drugs Fut 1998, 23, 11, 1199-1204. |
| 【3】 Kwak, J.H.; Jeong, Y.N.; Oh, J.I. (LG Chem Ltd.); Novel quinoline carboxylic acid derivs. having 7-(4-amino-methyl-3-oxime)pyrrolidine substituents and processes for their preparation. CA 2151890; EP 0688772; JP 1996041050; US 5633262; US 5698570; US 5776944 . |
| 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) | 10309 | ethyl 2-aminoacetate; Glycine ethyl ester | 459-73-4 | C4H9NO2 | 详情 | 详情 |
| (II) | 10847 | Acrylonitrile | 107-13-1 | C3H3N | 详情 | 详情 |
| (III) | 17731 | ethyl 2-[(2-cyanoethyl)amino]acetate | C7H12N2O2 | 详情 | 详情 | |
| (IV) | 17732 | tert-butyl 3-cyano-4-oxo-1-pyrrolidinecarboxylate | C10H14N2O3 | 详情 | 详情 | |
| (V) | 17733 | tert-butyl 3-cyano-4-hydroxy-1-pyrrolidinecarboxylate | C10H16N2O3 | 详情 | 详情 | |
| (VI) | 17734 | tert-butyl 3-[[(tert-butoxycarbonyl)amino]methyl]-4-hydroxy-1-pyrrolidinecarboxylate | C15H28N2O5 | 详情 | 详情 | |
| (VII) | 17735 | tert-butyl 3-[[(tert-butoxycarbonyl)amino]methyl]-4-oxo-1-pyrrolidinecarboxylate | C15H26N2O5 | 详情 | 详情 | |
| (VIII) | 15455 | (aminooxy)methane; O-methylhydroxylamine | 67-62-9 | CH5NO | 详情 | 详情 |
| (IX) | 17737 | tert-butyl 3-[[(tert-butoxycarbonyl)amino]methyl]-4-(methoxyimino)-1-pyrrolidinecarboxylate | C16H29N3O5 | 详情 | 详情 | |
| (X) | 17738 | 4-(aminomethyl)-3-pyrrolidinone O-methyloxime | C6H13N3O | 详情 | 详情 | |
| (XI) | 17034 | 7-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydro[1,8]naphthyridine-3-carboxylic acid | 100361-18-0 | C12H8ClFN2O3 | 详情 | 详情 |