一种制备7-苯乙酰氨基-3-氯甲基-4-头孢烷酸对甲氧基苄酯的方法,包括以下步骤:在反应釜中加入基准物氮杂丁酮亚磺酸,并依次加入基准物重量15~25倍的氯化溶剂和1~5%重量的催化剂。开启循环泵,使物料通过薄膜氯化器进行循环,并控制反应温度在20~25℃之间。以空气为载体通入氯气进行氯化反应,当反应结束时停止通入氯气并回收氯化溶剂。然后加入闭环溶剂,在25~30℃的条件下按1.0~1.4mol/mol基准物的比例滴加闭环剂,并在同样温度下用PH调节剂(盐酸、硫酸或醋酸)调节pH值至4~6,继续搅拌后放料离心并用溶剂洗涤。最终干燥处理获得产品7-苯乙酰氨基-3-氯甲基-4-头孢烷酸对甲氧基苄酯。
所使用的氯化溶剂可以是1,4-二氧六环、氯代环己烷、二氯甲烷或甲苯中的一种或几种;催化剂可以选择1,2-环氧丙烷、1,3-环氧丙烷、1,2-丙二醇或1,3-丙二醇中的一种或几种。氯气通入的速度为每小时0.3摩尔/摩尔基准物,空气作为载体的通入量应为氯气体积的两倍,反应持续3.5小时后,取样检测原料氮杂丁酮亚磺酸面积小于0.8%时即视为反应终点。回收氯化溶剂应在真空度20mmHg下进行。
闭环溶剂可选择甲醇、乙醇、甲苯或二氯甲烷中的一种或几种,用量为基准物重量的20倍;滴加速度应控制在每小时1mol/mol基准物,滴加完成后搅拌60分钟。所用闭环剂可以是甲醇钠、乙醇钠单一产物或混合物,并且其浓度为30%(按重量计)。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | p-methoxybenzyl 7-amino-3-chloromethyl-3-cephem-4-carboxylate | 106773-36-8 | C16H17ClN2O4S | 368.841 |
4-甲氧基苄基(2S,5R,6R)-3,3-二甲基-7-氧代-6-[(苯基乙酰基)氨基]-4-硫杂-1-氮杂双环[3.2.0]庚烷-2-羧酸酯4-氧化物 | penicillin sulfoxide p-methoxybenzyl ester | 53956-74-4 | C24H26N2O6S | 470.546 |
—— | benzylpenicillin 4-methoxybenzyl ester | 30200-14-7 | C24H26N2O5S | 454.547 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
头孢克肟GENE杂质 | (4-methoxyphenyl)methyl (6R,7R)-3-methyl-8-oxo-7-[(2-phenylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate | 29126-11-2 | C24H24N2O5S | 452.531 |
—— | 3-iodomethyl-7-phenylacetylamido-3-cephem-4-carboxylic acid p-methoxybenzyl ester | 101156-40-5 | C24H23IN2O5S | 578.428 |
—— | 4-methoxybenzyl (6R,7R)-7-phenylacetylamino-3-formyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate | —— | C24H22N2O6S | 466.514 |
头孢克肟杂质 | 3-Vinyl-Δ3-cephem | 119608-90-1 | C25H24N2O5S | 464.542 |
—— | p-methoxybenzyl 3-(3-butenyl)-7-(phenylacetamido)-Δ3-cephem-4-carboxylate | —— | C27H28N2O5S | 492.596 |
—— | p-methoxybenzyl 3-allyl-7-(phenylacetamido)-Δ3-cephem-4-carboxylate | —— | C26H26N2O5S | 478.569 |
—— | 7-phenylacetamido-3-chloromethyl-3-cephem-4-carboxylic acid | —— | C16H15ClN2O4S | 366.825 |
—— | p-Methoxybenzyl 7beta-[2-phenylacetamido]-3-[3-chloro-1-propenyl]-3-cephem-4-carboxylate | 217197-44-9 | C26H25ClN2O5S | 513.014 |
—— | p-methoxybenzyl 3-(2,3-butadienyl)-7-(phenylacetamido)-Δ3-cephem-4-carboxylate | —— | C27H26N2O5S | 490.58 |
—— | p-methoxybenzyl 7-amino-3-chloromethyl-3-cephem-4-carboxylate | 106773-36-8 | C16H17ClN2O4S | 368.841 |
—— | p-methoxybenzyl 3-phenethyl-7-(phenylacetamido)-Δ3-cephem-4-carboxylate | —— | C31H30N2O5S | 542.656 |
—— | p-methoxybenzyl 3-cinnamyl-7-(phenylacetamido)-Δ3-cephem-4-carboxylate | —— | C32H30N2O5S | 554.667 |
—— | p-methoxybenzyl 3-[2-(p-bromophenyl)ethyl]-7-(phenylacetamido)-Δ3-cephem-4-carboxylate | —— | C31H29BrN2O5S | 621.552 |
—— | p-methoxybenzyl 3-[2-(p-nitrophenyl)ethyl]-7-(phenylacetamido)-Δ3-cephem-4-carboxylate | —— | C31H29N3O7S | 587.653 |
—— | p-methoxybenzyl 3-(3,5-dimethyl-4-methoxyphenylthio)methyl-7-phenylacetamido-Δ3-cephem-4-carboxylate | 214203-32-4 | C33H34N2O6S2 | 618.775 |
头孢妥仑酯的中间体 | p-Methoxybenzyl 7-phenylacetamido-3(Z)-(4-methylthiazol-5-yl)vinyl-3-cephem-4-carboxylate | 138514-31-5 | C29H27N3O5S2 | 561.682 |
—— | p-Methoxybenzyl 7-phenylacetamido-3(E)-(4-methylthiazol-5-yl)vinyl-3-cephem-4-carboxylate | 104146-11-4 | C29H27N3O5S2 | 561.682 |
—— | (6R,7R)-4-methoxybenzyl 8-oxo-3-(((2-oxo-2H-chromen-7-yl)oxy)methyl)-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate | 1450821-66-5 | C33H28N2O8S | 612.66 |
—— | p-methoxybenzyl 3-(3,5-di-tert-butyl-4-methoxyphenyl)thiomethyl-7-phenylacetamido-Δ3-cephem-4-carboxylate | 214203-31-3 | C39H46N2O6S2 | 702.936 |
7-(苯基乙酰氨基)-3-乙烯基头孢烯-4-羧酸 | 7-(phenylacetamido)-3-vinylcephem-4-carboxylic acid | 33748-00-4 | C17H16N2O4S | 344.391 |
—— | (6R,7R)-3-((benzoylthio)methyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | 3595-40-2 | C23H20N2O5S2 | 468.554 |
—— | 3-[(tert-butyldimethylsilyloxy)benzamido]methyl-7-phenylacetamido-3-cephem-4-carboxylic acid p-methoxybenzyl ester | 917470-58-7 | C37H43N3O7SSi | 701.916 |
—— | 3-[tert-butyldimethylsilyloxy-(4-methoxybenzoyl)amino]methyl-7-phenylacetamido-3-cephem-4-carboxylic acid p-methoxybenzyl ester | 917470-40-7 | C38H45N3O8SSi | 731.942 |
—— | 3-[tert-butyldimethylsilyloxy-(4-methylbenzoyl)amino]methyl-7-phenylacetamido-3-cephem-4-carboxylic acid p-methoxybenzyl ester | 917470-57-6 | C38H45N3O7SSi | 715.943 |
—— | 3-[tert-butyldimethylsilyloxy-(4-fluorobenzoyl)amino]methyl-7-phenylacetamido-3-cephem-4-carboxylic acid p-methoxybenzyl ester | 917470-59-8 | C37H42FN3O7SSi | 719.906 |
—— | 3-[tert-butyldimethylsilyloxy-(4-trifluoromethylbenzoyl)amino]methyl-7-phenylacetamido-3-cephem-4-carboxylic acid p-methoxybenzyl ester | 917470-60-1 | C38H42F3N3O7SSi | 769.914 |
—— | (Z)-[(6R,7R)-2-carboxy-8-oxo-7-[(2-phenylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methoxyimino-(diethylamino)-oxidoazanium | 1402070-25-0 | C20H25N5O6S | 463.514 |
—— | (6R,7R)-4-methoxybenzyl 8-oxo-3-(((2-oxo-2H-chromen-7-yl)oxy)methyl)-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide | 1450821-67-6 | C33H28N2O9S | 628.659 |
—— | (6R,7R)-8-oxo-3-(((2-oxo-2H-chromen-7-yl)oxy)methyl)-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | 1262837-61-5 | C25H20N2O7S | 492.509 |
—— | (6R,7R)-4-methoxybenzyl 3-(((4-methyl-2-oxo-2H-chromen-7-yl)thio)methyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide | 1450821-69-8 | C34H30N2O8S2 | 658.753 |
—— | (6R,7R)-4-methoxybenzyl 8-oxo-3-(((2-oxo-2H-chromen-7-yl)oxy)methyl)-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5,5-dioxide | 1450821-68-7 | C33H28N2O10S | 644.659 |
—— | p-Methoxybenzyl 7-amino-3(Z)-(4-methylthiazol-5-yl)vinyl-3-cephem-4-carboxylate | 119608-99-0 | C21H21N3O4S2 | 443.547 |
—— | p-Methoxybenzyl 7-amino-3(E)-(4-methylthiazol-5-yl)vinyl-3-cephem-4-carboxylate | 104146-12-5 | C21H21N3O4S2 | 443.547 |
—— | (6R,7R)-3-((4-nitrophenoxy)methyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 5,5-dioxide | —— | C22H19N3O9S | 501.474 |
—— | (6R,7R)-8-oxo-3-(((2-oxo-2H-chromen-7-yl)oxy)methyl)-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 5-oxide | 1262837-62-6 | C25H20N2O8S | 508.508 |
—— | ((6R,7R)-8-oxo-3-(((2-oxo-2H-chromen-7-yl)oxy)methyl)-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 5,5-dioxide) | 1450821-58-5 | C25H20N2O9S | 524.508 |
—— | (6R,7R)-3-(((4-methyl-2-oxo-2H-chromen-7-yl)thio)methyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 5-oxide | 1450821-70-1 | C26H22N2O7S2 | 538.602 |
—— | 1-cyclopropyl-6-fluoro-7-{4-[2-(4-methoxy-benzyloxycarbonyl)-8-oxo-7-phenylacetylamino-5-thia-1-aza-bicyclo[4.3.0]oct-2-en-3-ylmethyl]-piperazin-1-yl}-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid | 143488-25-9 | C41H40FN5O8S | 781.862 |
—— | (6R,7R)-4-methoxybenzyl 3-((4-(8-nitro-4-oxo-6-(trifluoromethyl)-4H-benzo[e][1,3]thiazin-2-yl)piperazin-1-yl)methyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate | —— | C37H33F3N6O8S2 | 810.832 |
头孢妥仑匹酯 | cefditoren pivoxil | 117467-28-4 | C25H28N6O7S3 | 620.731 |
甲基1207E | Pivaloyloxymethyl 7-<(Z)-2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido>-3(E)-(4-methylthiazol-5-yl)vinyl-3-cephem-4-carboxylate | 138514-32-6 | C25H28N6O7S3 | 620.731 |
—— | 7-[4-(carboxy-8-oxo-7-phenylacetylamino-5-thia-1-aza-bicyclo[4.2.0]oct-2-en-3-ylmethyl)-piperazin-1-yl]-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid | 143983-11-3 | C33H32FN5O7S | 661.711 |
—— | (6R,7R)-3-((4-(8-nitro-4-oxo-6-(trifluoromethyl)-4H-benzo[e][1,3]thiazin-2-yl)piperazin-1-yl)methyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid | —— | C29H25F3N6O7S2 | 690.681 |
7-氨基-3-乙烯基-3-头孢环-4-羧酸 | 7-AVCA | 79349-82-9 | C9H10N2O3S | 226.256 |
—— | (4-methoxyphenyl)methyl (2R,6R,7R)-3-methylidene-8-oxo-7-[(2-phenylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]octane-2-carboxylate | 101156-43-8 | C24H24N2O5S | 452.531 |
—— | 4-methoxybenzyl 7β-phenylacetamido-3-methylenecepham-4-carboxylate | 101156-43-8 | C24H24N2O5S | 452.531 |
—— | (6R,7R)-4-methoxybenzyl 8-oxo-3-(((4-methyl-2-oxo-2H-chromen-7-yl)thio)methyl)-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylate | —— | C34H30N2O7S2 | 642.753 |
—— | (6R,7R)-8-oxo-3-(((4-methyl-2-oxo-2H-chromen-7-yl)thio)methyl)-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylic acid | —— | C26H22N2O6S2 | 522.602 |