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【结 构 式】 
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【分子编号】20466 【品名】1-bromo-3-(bromomethyl)benzene 【CA登记号】823-78-9 |
【 分 子 式 】C7H6Br2 【 分 子 量 】249.93264 【元素组成】C 33.64% H 2.42% Br 63.94% |
合成路线1
该中间体在本合成路线中的序号：(VIII)This compound has been obtained by two related ways: 1) The sulfonation of 3,5-dichloroaniline (I) with chlorosulfonic acid gives 2-amino-4,6-dichlorobenzenesulfonyl chloride (II), which is condensed with 3-bromobenzylamine (III) by means of TEA yielding the corresponding sulfonamide (IV). The cyclization of (IV) with glyoxylic acid (A) in ethanol/sulfuric acid affords the esterified benzothiadiazine-3-carboxylate (V), which is finally hydrolyzed with aqueous NaOH. 2) The reaction of sulfonyl chloride (II) with liquid ammonia gives the corresponding sulfonamide (VI), which is cyclized with glyoxylic acid (A) as before yielding the benzothiadiazine (VII). Finally the alkylation of (VII) with 3-bromobenzyl bromide (VIII) by means of NaH affords the already reported benzothiadiazine-3-carboxylate (V). 3) The enantiomers of the title compound have been obtained in optically pure form by preparative liquid chromatography on a Pirkle-type chiral phase column.
| 【1】 Shot, J.H.; Biermacher, U.; Synthesis of potential diuretic agents. II. Dichloro-derivatives of 1,2,4-benzothiadiazine-1,1-dioxide. J Am Chem Soc 1960, 2, 1135-38. |
| 【2】 Mignani, S.; et al.; 2H-3,4-Dihydro-1,2,4-benzothiadiazine-1, 1-dioxide-3-carboxylic acid derivatives, a novel family of glycine antagonists of the NMDA receptor channel complex. Drugs Fut 1995, 20, 11, 1133. |
| 【3】 Jimonet, P.; et al.; Synthesis and SAR of 2H-1,2,4-benzothiadiazine-1, 1-dioxide-3-carboxylic acid derivatives as novel potent glycine antagonists of the NMDA receptor-channel complex. Bioorg Med Chem Lett 1994, 4, 23, 2735. |
| 【4】 Boireau, A.; Malgouris, C.; Burgevin, M.C.; et al.; Neuroprotective effects of RPR 104632, a novel antagonist at the glycine site of the NMDA receptor, in vitro. Eur J Pharmacol 1996, 300, 3, 237. |
| 【5】 Doble, A.; Boireau, A.; et al.; RPR 104632, a novel antagonist at the glycine site of the N-methyl-D-aspartate receptor-channel complex. Can J Physiol Pharmacol 1994, 72, Suppl. 1, 333. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (A) | 15618 | 2-Oxoacetic acid; Glyoxylic Acid | 298-12-4 | C2H2O3 | 详情 | 详情 |
| (I) | 26542 | 3,5-dichloroaniline | 626-43-7 | C6H5Cl2N | 详情 | 详情 |
| (II) | 41179 | 2-amino-4,6-dichlorobenzenesulfonyl chloride | C6H4Cl3NO2S | 详情 | 详情 | |
| (III) | 41180 | (3-bromophenyl)methanamine; 3-bromobenzylamine | C7H8BrN | 详情 | 详情 | |
| (IV) | 41181 | 2-amino-N-(3-bromobenzyl)-4,6-dichlorobenzenesulfonamide | C13H11BrCl2N2O2S | 详情 | 详情 | |
| (V) | 41182 | ethyl 2-(3-bromobenzyl)-6,8-dichloro-1,1-dioxo-1,2,3,4-tetrahydro-1lambda(6),2,4-benzothiadiazine-3-carboxylate | C17H15BrCl2N2O4S | 详情 | 详情 | |
| (VI) | 41183 | 2-amino-4,6-dichlorobenzenesulfonamide | C6H6Cl2N2O2S | 详情 | 详情 | |
| (VII) | 41184 | ethyl 6,8-dichloro-1,1-dioxo-1,2,3,4-tetrahydro-1lambda(6),2,4-benzothiadiazine-3-carboxylate | C10H10Cl2N2O4S | 详情 | 详情 | |
| (VIII) | 20466 | 1-bromo-3-(bromomethyl)benzene | 823-78-9 | C7H6Br2 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(I)Grignard reagent (II) was prepared from 3-bromobenzyl halide (I) in Et2O at 0 C, and subsequently added to estrone (III) to provide the target carbinol.
| 【1】 Poirier, D.; Boivin, R.P.; 17alpha-Alkyl- or 17alpha-substituted benzyl-17beta-estradiols: A new family of estrone-sulfatase inhibitors. Bioorg Med Chem Lett 1998, 8, 14, 1891. |
合成路线3
该中间体在本合成路线中的序号：(I)Treatment of 3-bromobenzyl bromide (I) with sodium methoxide gives 1-bromo-3-(methoxymethyl)benzene (II). After conversion of aryl bromide (II) into the corresponding Grignard reagent (III), addition to epoxide (IV) in the presence of CuI affords the chiral alcohol (V). Removal of the O-trityl protecting group of (V) under acidic conditions provides diol (VI), which is selectively acylated at the primary hydroxyl group by means of acetyl chloride and 2,4,6-collidine to produce the mono-acetate (VII). After protection of the secondary hydroxyl group of (VII) as the tetrahydropyranyl ether (VIII), alkaline hydrolysis of the acetate ester group leads to the primary alcohol (IX). Subsequent Swern oxidation of alcohol (IX) provides aldehyde (X). Condensation of aldehyde (X) with tetrabromomethane in the presence of triphenylphosphine furnishes the gem-dibromoolefin (XI). This is then converted to the terminal alkyne (XII) by treatment with butyllithium in cold THF.
| 【2】 Ohuchida, S.; Maruyama, T. (Ono Pharmaceutical Co., Ltd.); 5-Thia-omega-substd. phenyl-prostaglandin E derivs., process for producing the same and drugs containing the same as the active ingredient. EP 1097922; JP 2001089444; US 6462081; WO 0003980 . |
| 【1】 Maruyama, T.; et al.; Design and synthesis of a selective EP4-receptor agonist. Part 3: 16-Phenyl-5-thiaPGE1 and 9-beta-halo derivatives with improved stability. Bioorg Med Chem 2002, 10, 6, 1743. |
| 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) | 20466 | 1-bromo-3-(bromomethyl)benzene | 823-78-9 | C7H6Br2 | 详情 | 详情 |
| (II) | 56397 | 3-bromobenzyl methyl ether; 1-bromo-3-(methoxymethyl)benzene | C8H9BrO | 详情 | 详情 | |
| (III) | 57226 | bromo[3-(methoxymethyl)phenyl]magnesium | C8H9BrMgO | 详情 | 详情 | |
| (IV) | 41006 | (2S)-oxiranylmethyl trityl ether; (2S)-2-[(trityloxy)methyl]oxirane | C22H20O2 | 详情 | 详情 | |
| (V) | 56398 | (2S)-1-[3-(methoxymethyl)phenyl]-3-(trityloxy)-2-propanol | C30H30O3 | 详情 | 详情 | |
| (VI) | 56399 | (2S)-3-[3-(methoxymethyl)phenyl]-1,2-propanediol | C11H16O3 | 详情 | 详情 | |
| (VII) | 56400 | (2S)-2-hydroxy-3-[3-(methoxymethyl)phenyl]propyl acetate | C13H18O4 | 详情 | 详情 | |
| (VIII) | 56401 | (2S)-3-[3-(methoxymethyl)phenyl]-2-(tetrahydro-2H-pyran-2-yloxy)propyl acetate | C18H26O5 | 详情 | 详情 | |
| (IX) | 56402 | (2S)-3-[3-(methoxymethyl)phenyl]-2-(tetrahydro-2H-pyran-2-yloxy)-1-propanol | C16H24O4 | 详情 | 详情 | |
| (X) | 56403 | (2S)-3-[3-(methoxymethyl)phenyl]-2-(tetrahydro-2H-pyran-2-yloxy)propanal | C16H22O4 | 详情 | 详情 | |
| (XI) | 56404 | (1S)-3,3-dibromo-1-[3-(methoxymethyl)benzyl]-2-propenyl tetrahydro-2H-pyran-2-yl ether; 2-({(1S)-3,3-dibromo-1-[3-(methoxymethyl)benzyl]-2-propenyl}oxy)tetrahydro-2H-pyran | C17H22Br2O3 | 详情 | 详情 | |
| (XII) | 56405 | (1S)-1-[3-(methoxymethyl)benzyl]-2-propynyl tetrahydro-2H-pyran-2-yl ether; 2-({(1S)-1-[3-(methoxymethyl)benzyl]-2-propynyl}oxy)tetrahydro-2H-pyran | C17H22O3 | 详情 | 详情 |
合成路线4
该中间体在本合成路线中的序号：(I)Bromine displacement in 3-bromobenzyl bromide (I) with sodium methoxide gives the methyl ether (II). Subsequent addition of the Grignard reagent prepared from aryl bromide (II) to (S)-O-trityl glycidol (III) in the presence of CuI affords alcohol (IV). Deprotection of the O-trityl group of (IV) under acidic conditions yields diol (V), which is selectively acetylated at the primary hydroxyl group with acetyl chloride and s-collidine in cold CH2Cl2. The resultant secondary alcohol (VI) is then protected as the tetrahydropyranyl ether (VII) upon treatment with dihydropyran and pyridinium p-toluenesulfonate. After basic hydrolysis of the acetate ester (VII), the liberated primary alcohol (VIII) is oxidized to aldehyde (IX) under Swern conditions. Condensation of aldehyde (IX) with carbon tetrabromide in the presence of triphenylphosphine produces the dibromovinyl adduct (X). Debromination of (X) by means of butyllithium in cold THF furnishes the terminal acetylene (XI).
| 【1】 Maruyama, T.; et al.; Design and synthesis of a selective EP4-receptor agonist. Part 3: 16-Phenyl-5-thiaPGE1 and 9-beta-halo derivatives with improved stability. Bioorg Med Chem 2002, 10, 6, 1743. |
| 【2】 Ohuchida, S.; Maruyama, T. (Ono Pharmaceutical Co., Ltd.); 5-Thia-omega-substd. phenyl-prostaglandin E derivs., process for producing the same and drugs containing the same as the active ingredient. EP 1097922; JP 2001089444; US 6462081; WO 0003980 . |
| 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) | 20466 | 1-bromo-3-(bromomethyl)benzene | 823-78-9 | C7H6Br2 | 详情 | 详情 |
| (II) | 56397 | 3-bromobenzyl methyl ether; 1-bromo-3-(methoxymethyl)benzene | C8H9BrO | 详情 | 详情 | |
| (III) | 41006 | (2S)-oxiranylmethyl trityl ether; (2S)-2-[(trityloxy)methyl]oxirane | C22H20O2 | 详情 | 详情 | |
| (IV) | 56395 | (2R,4R,6S,7R,10R,13S,14R,15S,16S,18S)-13-(acetyloxy)-18-({(2R,3S)-3-[(tert-butoxycarbonyl)amino]-3-(3-fluoro-2-pyridinyl)-2-[(triisopropylsilyl)oxy]propanoyl}oxy)-4-[(dimethylamino)methyl]-16-hydroxy-7,19,20,20-tetramethyl-3,5,11-trioxapentacyclo[14.3.1.0~2,6~.0~7,14~.0~10,13~]icosa-1(19),8-dien-15-yl benzoate | C55H78FN3O13Si | 详情 | 详情 | |
| (V) | 56399 | (2S)-3-[3-(methoxymethyl)phenyl]-1,2-propanediol | C11H16O3 | 详情 | 详情 | |
| (VI) | 56400 | (2S)-2-hydroxy-3-[3-(methoxymethyl)phenyl]propyl acetate | C13H18O4 | 详情 | 详情 | |
| (VII) | 56401 | (2S)-3-[3-(methoxymethyl)phenyl]-2-(tetrahydro-2H-pyran-2-yloxy)propyl acetate | C18H26O5 | 详情 | 详情 | |
| (VIII) | 56402 | (2S)-3-[3-(methoxymethyl)phenyl]-2-(tetrahydro-2H-pyran-2-yloxy)-1-propanol | C16H24O4 | 详情 | 详情 | |
| (IX) | 56403 | (2S)-3-[3-(methoxymethyl)phenyl]-2-(tetrahydro-2H-pyran-2-yloxy)propanal | C16H22O4 | 详情 | 详情 | |
| (X) | 56404 | (1S)-3,3-dibromo-1-[3-(methoxymethyl)benzyl]-2-propenyl tetrahydro-2H-pyran-2-yl ether; 2-({(1S)-3,3-dibromo-1-[3-(methoxymethyl)benzyl]-2-propenyl}oxy)tetrahydro-2H-pyran | C17H22Br2O3 | 详情 | 详情 | |
| (XI) | 56405 | (1S)-1-[3-(methoxymethyl)benzyl]-2-propynyl tetrahydro-2H-pyran-2-yl ether; 2-({(1S)-1-[3-(methoxymethyl)benzyl]-2-propynyl}oxy)tetrahydro-2H-pyran | C17H22O3 | 详情 | 详情 |