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【结 构 式】 
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【分子编号】68609 【品名】diethyl 3-chloro-1-(2,2-dimethoxyethyl)-4-oxo-1,4-dihydropyridine-2,5-dicarboxylate 【CA登记号】 |
【 分 子 式 】C15H20ClNO7 【 分 子 量 】361.779 【元素组成】C 49.80% H 5.57% Cl 9.80% N 3.87% O 30.96% |
合成路线1
该中间体在本合成路线中的序号：(LIII)Condensation of ethyl 4-chloro-3-oxobutyrate (XXX) with N,Ndimethylformamide dimethylacetal (XXXII) in EtOAc results in ethyl 2-(chloroacetyl)-3-(dimethylamino)-2-propenoate (LI), which by cyclocondensation with ethyl oxalyl chloride (XXI) by means of LiHMDS in THF affords diethyl 3-chloro-4-oxopyran-2,5-dicarboxylate (LII). Condensation of pyranone (LII) with 2,2-dimethoxyethylamine (XXVI) in EtOH gives pyridone (LIII), which is then hydrolyzed using HCOOH and H2SO4 in CH2Cl2 to yield the corresponding aldehyde (LIV). Cyclization of compound (LIV) with 3(R)-amino-1-butanol (XI) and AcOH in refluxing MeOH/toluene provides the hexahydropyrido[1’,2’:4,5]pyrazino[2,1-b][1,3]oxazine derivative (LV), which by hydrolysis with KOSiMe3 in DME affords the hydroxy acid (LVI). Finally, acid (LVI) is coupled with 2,4-difluorobenzylamine (XIV) in the presence of HATU and NMM in DMF .
| 【1】 Sumino, Y., Okamoto, K., Masui, M., Yamada, D., Ikarashi, F. (Shionogi & Co., Ltd.). Process for preparing compound having HIV integrase inhibitory activity. WO 2012018065. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (XI) | 68577 | 3(R)-amino-1-butanol;(R)-3-aminobutan-1-ol | 61477-39-2 | C4H11NO | 详情 | 详情 |
| (XIV) | 68578 | 2,4-difluorobenzylamine | 72235-52-0 | C7H7F2N | 详情 | 详情 |
| (XV) | 68579 | (4R,12aS)-7-(benzyloxy)-N-(2,4-difluorobenzyl)-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxamide | C27H25F2N3O5 | 详情 | 详情 | |
| (XXI) | 11043 | Ethyl 2-chloro-2-oxoacetate; Ethyl oxalyl chloride | 4755-77-5 | C4H5ClO3 | 详情 | 详情 |
| (XXVI) | 34158 | aminoacetaldehyde dimethylacetal; 2,2-dimethoxy-1-ethanamine; 2,2-dimethoxyethylamine | 22483-09-6 | C4H11NO2 | 详情 | 详情 |
| (XXX) | 23541 | ethyl 4-chloro-3-oxobutanoate；Ethyl 4-chloro-3-oxobutanoate；Ethyl 4-chloroacetoacetate | 638-07-3 | C6H9ClO3 | 详情 | 详情 |
| (XXXII) | 11984 | N-(Dimethoxymethyl)-N,N-dimethylamine;dimethylformamide dimethylacetal;1,1-dimethoxy-N,N-dimethylmethanamine； Dimethoxy-N,N-dimethylmethanamine; N,N-Dimethylformamide dimethyl acetal | 4637-24-5 | C5H13NO2 | 详情 | 详情 |
| (LI) | 68607 | ethyl 2-(chloroacetyl)-3-(dimethylamino)-2- propenoate;(E)-ethyl 4-chloro-2-((dimethylamino)methylene)-3-oxobutanoate | C9H14ClNO3 | 详情 | 详情 | |
| (LII) | 68608 | diethyl 3-chloro-4-oxo-4H-pyran-2,5-dicarboxylate | C11H11ClO6 | 详情 | 详情 | |
| (LIII) | 68609 | diethyl 3-chloro-1-(2,2-dimethoxyethyl)-4-oxo-1,4-dihydropyridine-2,5-dicarboxylate | C15H20ClNO7 | 详情 | 详情 | |
| (LIV) | 68610 | diethyl 3-chloro-4-oxo-1-(2-oxoethyl)-1,4-dihydropyridine-2,5-dicarboxylate | C13H14ClNO6 | 详情 | 详情 | |
| (LV) | 68612 | (4R,12aS)-ethyl 7-chloro-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylate | C15H17ClN2O5 | 详情 | 详情 | |
| (LVI) | 68611 | (4R,12aS)-7-chloro-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid | C13H13ClN2O5 | 详情 | 详情 |