2-(1,1-dimethylethyl) 4-ethyl 3,5-dimethyl-1H-pyrrole-2,4-dicarboxylate -Drug Synthesis Database

【结构式】

【分子编号】63354

【品名】2-(1,1-dimethylethyl) 4-ethyl 3,5-dimethyl-1H-pyrrole-2,4-dicarboxylate

【CA登记号】86770-31-2

【分子式】C₁₄H₂₁NO₄

【分子量】267.32508

【元素组成】C 62.9% H 7.92% N 5.24% O 23.94%

与该中间体有关的原料药合成路线共 2 条

合成路线1 合成路线2

合成路线1

该中间体在本合成路线中的序号：(IV)

Nitrosation of tert-butyl acetoacetate (I) with NaNO2/AcOH produces the oximino ester (II). Reductive cyclization of (II) with ethyl acetoacetate (III) in the presence of Zn/AcOH leads to the pyrrole dicarboxylate (IV). Selective decarboxylation of the t-butyl ester of (IV) under acidic conditions, followed by Vilsmeier formylation of the intermediate ethyl 2,4-dimethylpyrrole-3-carboxylate furnishes the pyrrole aldehyde (V). Alternatively, this compound is directly obtained from (IV) upon treatment with trimethyl orthoformate and trifluoroacetic acid. Basic hydrolysis of the ethyl ester group of (V) yields the pyrrolecarboxylic acid (VI). This is coupled to 2-(diethylamino)ethylamine (VII) to afford the corresponding amide (VIII).

参考文献中间体

合成目标

【1】 Sun, L.; Liang, C.; Shirazian, S.; Zhou, Y.; Miller, T.; Ciu, J.; Fukuda, J.Y.; Chu, J.-Y.; Nematalla, A.; Wang, X.; Chen, H.; Sistla, A.; Luu, T.C.; Tang, F.; Wei, J.; Tang, C.; Discovery of 5-[5-fluoro-2-oxo-1,2-dihydroindol-(3Z)-ylidenemethyl]-2,4-dimethyl-1H-pyrrole-3-carboxylic acid (2-diethylaminoethyl)amide, a novel tyrosine kinase inhibitor targeting vascular endothelial and platelet-derived growth factor receptor tyrosine. J Med Chem 2003, 46, 7, 1116.
【2】 Wei, C.C.; Miller, T.; Tang, P.C.; Nematalla, A.S.; Li, X.; Liang, C.; Shirazian, S.; Su, L.; Vojkovsky, T. (Sugen, Inc.); Pyrrole substd. 2-indolinone protein kinase inhibitors. EP 1255752; US 2002156292; US 6573293; WO 0160814 .
【3】 Shenoy, N.; Sorasuchart, W. (Sugen, Inc.); Formulations for pharmaceutical agents ionizable as free acids or free bases. JP 2003514851; WO 0137820 .

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)	27907	Acetoacetic acid tert-butyl ester;3-Oxo-butanoic acid 1,1-dimethylethyl estertert-butyl 3-oxobutanoate	1694-31-1	C₈H₁₄O₃	详情	详情
(II)	63353	1,1-dimethylethyl 2-(hydroxyimino)-3-oxobutanoate	14352-65-9	C₈H₁₃NO₄	详情	详情
(III)	11819	ethyl acetoacetate; ethyl 3-oxobutanoate；Acetoacetic ester;Ethyl beta-ketobutyrate;ethyl 3-oxobutyrate	141-97-9	C₆H₁₀O₃	详情	详情
(IV)	63354	2-(1,1-dimethylethyl) 4-ethyl 3,5-dimethyl-1H-pyrrole-2,4-dicarboxylate	86770-31-2	C₁₄H₂₁NO₄	详情	详情
(V)	60381	ethyl 5-formyl-2,4-dimethyl-1H-pyrrole-3-carboxylate	2199-59-9	C₁₀H₁₃NO₃	详情	详情
(VI)	60382	5-formyl-2,4-dimethyl-1H-pyrrole-3-carboxylic acid	253870-02-9	C₈H₉NO₃	详情	详情
(VII)	12420	N-(2-Aminoethyl)-N,N-diethylamine; N,N-Diethylethylene-diamine; N(1),N(1)-Diethyl-1,2-ethanediamine	100-36-7	C₆H₁₆N₂	详情	详情
(VIII)	63355	N-[2-(diethylamino)ethyl]-5-formyl-2,4-dimethyl-1H-pyrrole-3-carboxamide	356068-86-5	C₁₄H₂₃N₃O₂	详情	详情

合成路线2

该中间体在本合成路线中的序号：(IV)

参考文献中间体

合成目标

【1】 Jin QW, Mnuragis MA, May PD. 2003. Process for preparing aminocarbonylpyrrolylmethylideneindolinones from indolinones, imidazolcarbonylpyrrolecarboxaldehydes, and amines. W0 2003070725
【2】 Manley JM, Kalman MJ, Conway BG, et al. 2003. Early amidation approach to 3-[(4-anudo)pyrrol-2-yl]-2-indolinones. J Org Cbem, 68(16):6447～6450
【3】 Sun L, Liang C, Shirazian S, et aL. 2003. Discovery of 5-[5-Fluoro-2-oxo-l,2-dihydroindol-(3Z)-ylidenemethyl}2,4一dimethyl-lH-pyrrole-3-carboxylic acid (2-diethylaminoethyl) amide, a novel tyrosine kinase inhibitor targeting vascular endothelial and platelet-derived growth factor receptor tyrosine kinase. J Med Chem, 46(7): 1116～1119

中间体序号	中间体编号	品名	CAS号	分子式	供应商	用于合成
(II)	63353	1,1-dimethylethyl 2-(hydroxyimino)-3-oxobutanoate	14352-65-9	C₈H₁₃NO₄	详情	详情
(VIII)	14754	ethylenediamine;1,2-Diaminoethane;ethane-1,2-diamine；1,2-Ethanediamine	107-15-3	C₂H₈N₂	详情	详情
（IX）	66753	(E)-N-(2-(diethylamino)ethyl)-5-(((2-(diethylamino)ethyl)imino)methyl)-2,4-dimethyl-1H-pyrrole-3-carboxamide		C₂₀H₃₇N₅O	详情	详情
(X）	60384	5-fluoro-1,3-dihydro-2H-indol-2-one	56341-41-4	C₈H₆FNO	详情	详情
(XI）	66752	(Z)-N-[2-(Diethylamino)ethyl]-5-(5-fluoro-2-oxo-2,3-dihydro-1H-indol-3-ylidenemethyl)-2,4-dimethyl-1H-pyrrole-3-carboxamide	326914-13-0	C₂₂H₂₇FN₄O₂	详情	详情
(I)	27907	Acetoacetic acid tert-butyl ester;3-Oxo-butanoic acid 1,1-dimethylethyl estertert-butyl 3-oxobutanoate	1694-31-1	C₈H₁₄O₃	详情	详情
(III)	11819	ethyl acetoacetate; ethyl 3-oxobutanoate；Acetoacetic ester;Ethyl beta-ketobutyrate;ethyl 3-oxobutyrate	141-97-9	C₆H₁₀O₃	详情	详情
(IV)	63354	2-(1,1-dimethylethyl) 4-ethyl 3,5-dimethyl-1H-pyrrole-2,4-dicarboxylate	86770-31-2	C₁₄H₂₁NO₄	详情	详情
(V)	60380	ethyl 2,4-dimethyl-1H-pyrrole-3-carboxylate	2199-51-1	C₉H₁₃NO₂	详情	详情
(VI)	60381	ethyl 5-formyl-2,4-dimethyl-1H-pyrrole-3-carboxylate	2199-59-9	C₁₀H₁₃NO₃	详情	详情
(VII)	60382	5-formyl-2,4-dimethyl-1H-pyrrole-3-carboxylic acid	253870-02-9	C₈H₉NO₃	详情	详情

Extended Information