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【结 构 式】 
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【分子编号】47195 【品名】7-(methylsulfanyl)-2-(tributylstannyl)imidazo[5,1-b][1,3]thiazole; methyl 2-(tributylstannyl)imidazo[5,1-b][1,3]thiazol-7-yl sulfide 【CA登记号】 |
【 分 子 式 】C18H32N2S2Sn 【 分 子 量 】459.30756 【元素组成】C 47.07% H 7.02% N 6.1% S 13.96% Sn 25.85% |
合成路线1
该中间体在本合成路线中的序号：(III)Imidazothiazole (I) is converted into methylsulfanyl derivative (II) by first reaction with EtMgBr in THF followed by treatment with MeSSO2Me. Lithiation of derivative (II) by means of BuLi in THF/hexane, followed by reaction with tributyltin chloride and LiHMDS, provides tributyltin derivative (III), which is then condensed with carbapenem derivative (VI) by means of Pd(dba)3, P(2-furyl)3 and ZnCl2 in NMP to afford (VII). (Derivative (VI) in turn can be obtained by first cyclization of the diazo compound (IV) by means of ZnBr2 and Rh2Oct4 in MeOAc/THF to provide bicyclic ketoester (V), which is finally treated with triflic anhydride (Tf2O) and DIEA in acetonitrile. The target product is finally obtained by first N-alkylation of the imidazothiazole ring of (VII) with iodoacetamide (VIII) in acetonitrile followed by deprotection of the carboxylic acid by hydrogenation over Pd/C inTHF/H2O.
| 【2】 Lynch, J.E.; Liu, T.M.-H.; Volante, R.P. (Merck & Co., Inc.); Process for synthesizing carbapenem intermediates using a rhodium catalyst and Lewis acid. US 5493018 . |
| 【1】 Sakakibara, S.; Takata, T.; Yamamoto, K.; Shitara, E.; Shibasaki, Y.; Shimizu, A.; Komiya, I.; CP5068, a new carbapenem: Synthesis and structure-activity relationships. 40th Intersci Conf Antimicrob Agents Chemother (Sept 17 2000, Toronto) 2000, Abst F-1236. |
| 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) | 47193 | 7-iodoimidazo[5,1-b][1,3]thiazole | C5H3IN2S | 详情 | 详情 | |
| (II) | 47194 | 7-(methylsulfanyl)imidazo[5,1-b][1,3]thiazole; imidazo[5,1-b][1,3]thiazol-7-yl methyl sulfide | C6H6N2S2 | 详情 | 详情 | |
| (III) | 47195 | 7-(methylsulfanyl)-2-(tributylstannyl)imidazo[5,1-b][1,3]thiazole; methyl 2-(tributylstannyl)imidazo[5,1-b][1,3]thiazol-7-yl sulfide | C18H32N2S2Sn | 详情 | 详情 | |
| (IV) | 38749 | 4-nitrobenzyl (4R)-2-diazo-4-[(2R,3S)-3-[(1R)-1-hydroxyethyl]-4-oxoazetidinyl]-3-oxopentanoate | C17H18N4O7 | 详情 | 详情 | |
| (V) | 22575 | 4-nitrobenzyl (2R,5R,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-3,7-dioxo-1-azabicyclo[3.2.0]heptane-2-carboxylate | C17H18N2O7 | 详情 | 详情 | |
| (VI) | 38750 | 4-nitrobenzyl (4R,5R,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-3-[[(trifluoromethyl)sulfonyl]oxy]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate | C18H17F3N2O9S | 详情 | 详情 | |
| (VII) | 47196 | 4-nitrobenzyl (4S,5R)-6-[(1R)-1-hydroxyethyl]-4-methyl-3-[7-(methylsulfanyl)imidazo[5,1-b][1,3]thiazol-2-yl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate | C23H22N4O6S2 | 详情 | 详情 | |
| (VIII) | 47197 | 2-iodoacetamide | 144-48-9 | C2H4INO | 详情 | 详情 |