CN114989102A - 一种奥沙西泮的制备方法 - Google Patents
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- 229960004535 oxazepam Drugs 0.000 title claims abstract description 24
- ADIMAYPTOBDMTL-UHFFFAOYSA-N oxazepam Chemical compound C12=CC(Cl)=CC=C2NC(=O)C(O)N=C1C1=CC=CC=C1 ADIMAYPTOBDMTL-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims description 22
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 15
- 229940125782 compound 2 Drugs 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 239000003153 chemical reaction reagent Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- ZCSHNCUQKCANBX-UHFFFAOYSA-N lithium diisopropylamide Chemical group [Li+].CC(C)[N-]C(C)C ZCSHNCUQKCANBX-UHFFFAOYSA-N 0.000 claims description 8
- 150000007530 organic bases Chemical class 0.000 claims description 8
- 229940126214 compound 3 Drugs 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- WYURNTSHIVDZCO-UHFFFAOYSA-N tetrahydrofuran Substances C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- LVZWSLJZHVFIQJ-UHFFFAOYSA-N Cyclopropane Chemical compound C1CC1 LVZWSLJZHVFIQJ-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000007810 chemical reaction solvent Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 150000007529 inorganic bases Chemical class 0.000 claims description 5
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 claims description 5
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 claims description 4
- 239000005695 Ammonium acetate Substances 0.000 claims description 4
- VGCXGMAHQTYDJK-UHFFFAOYSA-N Chloroacetyl chloride Chemical compound ClCC(Cl)=O VGCXGMAHQTYDJK-UHFFFAOYSA-N 0.000 claims description 4
- 235000019257 ammonium acetate Nutrition 0.000 claims description 4
- 229940043376 ammonium acetate Drugs 0.000 claims description 4
- 238000004537 pulping Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 231100000053 low toxicity Toxicity 0.000 abstract description 2
- 239000007858 starting material Substances 0.000 abstract description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 238000005481 NMR spectroscopy Methods 0.000 description 6
- SVUOLADPCWQTTE-UHFFFAOYSA-N 1h-1,2-benzodiazepine Chemical compound N1N=CC=CC2=CC=CC=C12 SVUOLADPCWQTTE-UHFFFAOYSA-N 0.000 description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000012043 crude product Substances 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
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- DIWRORZWFLOCLC-HNNXBMFYSA-N (3s)-7-chloro-5-(2-chlorophenyl)-3-hydroxy-1,3-dihydro-1,4-benzodiazepin-2-one Chemical compound N([C@H](C(NC1=CC=C(Cl)C=C11)=O)O)=C1C1=CC=CC=C1Cl DIWRORZWFLOCLC-HNNXBMFYSA-N 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 2
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 2
- 238000006972 Polonovski rearrangement reaction Methods 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- 238000006137 acetoxylation reaction Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229940125898 compound 5 Drugs 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229960003692 gamma aminobutyric acid Drugs 0.000 description 2
- BTCSSZJGUNDROE-UHFFFAOYSA-N gamma-aminobutyric acid Chemical compound NCCCC(O)=O BTCSSZJGUNDROE-UHFFFAOYSA-N 0.000 description 2
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 229960004391 lorazepam Drugs 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- ZUWXHHBROGLWNH-UHFFFAOYSA-N (2-amino-5-chlorophenyl)-phenylmethanone Chemical compound NC1=CC=C(Cl)C=C1C(=O)C1=CC=CC=C1 ZUWXHHBROGLWNH-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 206010053164 Alcohol withdrawal syndrome Diseases 0.000 description 1
- 208000024254 Delusional disease Diseases 0.000 description 1
- 102000027484 GABAA receptors Human genes 0.000 description 1
- 108091008681 GABAA receptors Proteins 0.000 description 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical class ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 208000029650 alcohol withdrawal Diseases 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000000935 antidepressant agent Substances 0.000 description 1
- 229940005513 antidepressants Drugs 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 210000003169 central nervous system Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- QWXYZCJEXYQNEI-OSZHWHEXSA-N intermediate I Chemical compound COC(=O)[C@@]1(C=O)[C@H]2CC=[N+](C\C2=C\C)CCc2c1[nH]c1ccccc21 QWXYZCJEXYQNEI-OSZHWHEXSA-N 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002858 neurotransmitter agent Substances 0.000 description 1
- 229960002640 nordazepam Drugs 0.000 description 1
- AKPLHCDWDRPJGD-UHFFFAOYSA-N nordazepam Chemical compound C12=CC(Cl)=CC=C2NC(=O)CN=C1C1=CC=CC=C1 AKPLHCDWDRPJGD-UHFFFAOYSA-N 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 oxime compound Chemical class 0.000 description 1
- 208000002851 paranoid schizophrenia Diseases 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 208000020016 psychiatric disease Diseases 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 102000005962 receptors Human genes 0.000 description 1
- 108020003175 receptors Proteins 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- CZDYPVPMEAXLPK-UHFFFAOYSA-N tetramethylsilane Chemical compound C[Si](C)(C)C CZDYPVPMEAXLPK-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D243/00—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms
- C07D243/06—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4
- C07D243/10—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4 condensed with carbocyclic rings or ring systems
- C07D243/14—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines
- C07D243/16—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines substituted in position 5 by aryl radicals
- C07D243/18—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines substituted in position 5 by aryl radicals substituted in position 2 by nitrogen, oxygen or sulfur atoms
- C07D243/24—Oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D243/00—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms
- C07D243/06—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4
- C07D243/10—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4 condensed with carbocyclic rings or ring systems
- C07D243/14—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines
- C07D243/16—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines substituted in position 5 by aryl radicals
- C07D243/18—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines substituted in position 5 by aryl radicals substituted in position 2 by nitrogen, oxygen or sulfur atoms
- C07D243/24—Oxygen atoms
- C07D243/26—Preparation from compounds already containing the benzodiazepine skeleton
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
本发明属于物化学制备领域,公开了一种奥沙西泮的制备方法。本申请公开的奥沙西泮制备工艺,在不改变起始物料的情况下,通过三步反应,总收率可达70%,反应在温和条件下进行,减少了能源消耗,降低成本;合成路线短,后处理方便,减少了环境污染,使得本发明更符合低毒,低污染的绿色合成要求。
Description
技术领域
本发明涉及药物化学制备领域,具体涉及奥沙西泮的制备方法。
背景技术
奥沙西泮属于短中效苯二氮类药物,通过作用于中枢神经系统苯二氮受体,加强 中枢抑制性神经递质GABA与GABAA受体结合,增强GABA系统的活性。奥沙西泮用于 治疗焦虑障碍的常见症状(焦虑、躁动、入睡困难);与抗抑郁药合用,治疗有上述症状的抑郁;用于妄想症、精神错乱和急性酒精戒断综合征。通过对奥沙西泮合成路线和工艺查询结果的整理,同时参考劳拉西泮和氯甲西泮以及有关苯二氮杂的合成路线,整理了奥沙西泮 合成的现有技术:
现有技术1:参考劳拉西泮(淮海工学院学报,2005,Vol.4,No.3)和氯甲西泮(药学研究, 2017,Vol.36,No.8)以及苯二氮杂类化合物的合成路线,如(1):以化合物2为起始物料, 先得到肟化合物7,经过合环、扩环、乙酰氧基化(Polonovski reaction)、水解等六步得到 奥沙西泮。这条路线的合环和扩环反应导致大量杂质,需要色谱柱纯化,不适合工业化生产。
现有技术2:文献(Arch.Pharm.Chem.Life Sci.2006,339)报道另一条路线,如(2):化合 物7在pH 11-14的醇溶液中直接得到奥沙西泮,收率59.8%,总收率50.8%,这条路线我们 尝试后,收率极低,纯化困难。
现有技术3:文献(Org.Process Res.Dev,2006,10,1192-1198)报道以化合物2为起始物 料,通过两步缩合得到七元环化合物4,化合物4氧化得到氮氧化物5,化合物5通过Polonovski reaction得到化合物9。此路线化合物5的合成,氧化收率只有50%(J.Org.Chem,1962,562), 不容易纯化,总收率不到30%,同时使用危险试剂过氧乙酸,不利于工业生产。如(3)。
现有技术4:文献(Org.Process Res.Dev,2006,10,1192-1198)同时报道了化合物4直接 在过硫酸盐和碘的存下乙酰氧化得到化合物9,乙酰氧基化反应收率60%左右,放大后有大 量杂质产生,影响产品质量;同时反应后处理会产生大量的废水,不符合环保要求。
以上现有技术中合成合成奥沙西泮的工艺步骤均较长,产率也相对较低;因此目前急需 一种工艺简单,步骤短、收率高且适宜工业化生产的奥沙西泮制备方法。
发明内容
本发明的目的在于针对现有技术不足,提供一种工艺简单、产品纯度高、最终收率高、 适合于产业化的奥沙西泮的制备方法。
本发明公开了一种制备奥沙西泮的方法,包括以下步骤:
第一步:将化合物2与无机碱的丙酮溶液冷却至10℃±0℃,并在<15℃下加入氯乙酰氯, 加毕,室温反应2-3小时。体系加水打浆,离心,固体干燥得到化合物3,收率95%-98%。
第二步:化合物3与乌洛托品(HMTM)、乙酸铵在无水乙醇条件下回流4-5小时。体系加水打浆,离心,固体干燥得到去甲西泮,收率85%-90%。
第三步:去甲西泮在有机碱活化下,与环丙烷试剂在反应溶剂中在一定反应温度下反应, 待反应完成后经乙酸乙酯萃取,干燥,浓缩得到奥沙西泮粗品,收率94%,按照常规工艺进 行活性炭精制后,纯度为99.8%,单杂小于0.1%。
优选地,第一步反应中所述化合物2与氯乙酰氯投料比为1:(1.0~1.5);
优选地,第一步反应中所述化合物2与无机碱的投料比为1:(0.5~1.0)。
优选地,第一步反应中无机碱为碳酸钠,碳酸钾,碳酸氢钠,氢氧化钠,氢氧化钾;更 优选地,无机碱为碳酸钠。
优选地,第一步反应中所述化合物2与丙酮投料比为1:5V);
优选地,第一步反应中所述化合物2与水投料比为1:(5V~15V)。优选地,第二步反应中所述化合物3与HMTM投料比为1:(1.5~2.5);
优选地,第二步反应中所述化合物3与乙酸铵投料比为1:(1.0~2.0);
优选地,第二步反应中所述化合物3与乙醇投料比为1:5V);
优选地,第二步反应中所述反应温度为80-90℃;
优选地,第二步反应中所述化合物2与水投料比为1:(5V~10V)。
进一步地,第三步反应中,所述去甲西泮与环丙烷试剂的投料比为1:(1.1~1.5);去甲 西泮与有机碱的投料比为1:(1.5~2.0)。
更进一步地,第三步反应中,所述环丙烷试剂为N-磺酰基氧杂吖丙啶。
进一步地,第三步反应中,所述有机碱为二异丙基氨基锂(LDA)或叔丁醇钾;
优选地,第三步反应中,所述有机碱为叔丁醇钾。
进一步地,第三步反应中,所述反应溶剂为THF。
进一步地,第三步反应中,所述反应温度为-45℃~0℃。
进一步地,第三步反应中,反应时间为1~2小时。
优选地,第三步反应中,反应后处理溶剂为乙酸乙酯。
优选地,第三步反应中,萃取液干燥后浓缩得到粗品,按照常规工艺进行活性炭精制后, 纯度为99.8%,单杂小于0.1%。
本发明带来的有益效果有:
1、本条路线只有三步反应,总收率70%,反应在温和条件下进行,减少了能源消耗,降 低成本;
2、在与现有技术中的合成路线相比,本申请的合成路线短,后处理方便,减少了环境污 染,使得本发明更符合低毒,低污染的绿色合成要求。
具体实施方式
以下将结合实施例对本发明作进一步的详细描述,本发明的实施例仅用于说明本发明的 技术方案,并非对本发明的限制,凡依照本发明公开的内容所作的任何本领域的等同置换, 均属于本发明的保护范围。
本公开所用化学试剂可来自商业途径。
化合物的结构通过核磁共振(1HNMR与13CNMR)来确定的。
核磁共振(1HNMR)位移(δ)以百万分之一(ppm)的单位给出;核磁共振(1HNMR 与13CNMR)的测定是用BrukerAVANCE-800核磁仪,测定溶剂为二甲亚砜(DMSO-d6), 内标为四甲基硅烷(TMS),化学位移是以10-6(ppm)作为单位给出。
本发明的术语“室温”是指温度处于10℃~25℃之间。
实施例1奥沙西泮的制备方法
向反应釜中加入3.90a kg丙酮,开启搅拌,加入1.00a kg氨基-5-氯-二苯甲酮和0.19a kg 碳酸氢钠搅拌,降温至15±5℃。将0.54a kg氯乙酰氯通过恒压滴液漏斗缓慢加入反应中,加 入过程中控制温度不超过25℃。加毕,控温20±5℃反应3h后,TLC中控。反应完后,体系 降温至10±5℃。缓慢加入10.0a kg饮用水,加入过程中控制温度不超过25℃。加毕,在20±5℃ 搅拌1±0.5h。离心,离心所得固体减压干燥,得淡黄色固体中间体Ⅰ,收率95%。
向反应釜中加入4.8b kg乙醇,依次加入1.00b kg乌洛托品、0.55b kg乙酸铵。体系升 温至90±5℃,反应5h,TLC监控反应。反应完成后,反应体系降至20±5℃。反应体系反应 液转移至准备好的水体系中,有粘稠物析出(均相→固液两相),加毕,在55±5℃搅拌6小 时。体系降至20±5℃搅拌2小时。离心,将滤饼减压干燥,得淡黄色固体粉末,收率:80%。
在氮气保护下,将去甲西泮(10g,0.037mol)溶于无水四氢呋喃(400ml)溶液冷却至 -15℃~-25℃。向其中分批加入叔丁醇钾(6.2g,0.056mol),保持温度不超过-10℃。搅拌老 化半小时,同时保持温度在-15℃~-25℃。向反应体系加入N-磺酰基氧杂吖丙啶(11.6g, 0.044mol),体系搅拌1小时,体系降温至0℃以下,加入饱和氯化铵水溶液(100ml),用400ml 乙酸乙酯萃取,有机相用饱和食盐水(100ml*2)洗涤,有机相硫酸钠干燥后过滤得到萃取 物。蒸发后得奥沙西泮10.0g,收率94.5%。
实施例2奥沙西泮的制备方法
去甲西泮的制备同实施例1。
在氮气保护下,将去甲西泮(10g,0.037mol)溶于无水四氢呋喃(400ml)溶液冷却至-15℃~-25℃。向其中滴加2.0M LDA(28ml,0.056mol),保持温度不超过-10℃。搅拌老化半小时,同时保持温度在-15℃~-25℃。向反应体系加入N-磺酰基氧杂吖丙啶(11.6g,0.044mol),体系搅拌1小时,体系降温至0℃以下,加入饱和氯化铵水溶液(100ml),用400ml乙酸乙酯萃取,有机相用饱和食盐水(100ml*2)洗涤,有机相硫酸钠干燥后过滤得到萃取物。 蒸发后得奥沙西泮9.0g,收率85.1%。
1H NMR(800MHz,DMSO)δ10.84(s,1H),7.66(dd,J=8.8,2.5Hz,1H),7.54–7.51(m,1H), 7.50(dd,J=5.3,3.2Hz,2H),7.47(dd,J=10.1,4.8Hz,2H),7.30(d,J=8.8Hz,1H),7.24(d,J= 2.5Hz,1H),6.38(d,J=8.7Hz,1H),4.81(d,J=8.7Hz,1H)。
13C NMR(201MHz,DMSO)δ170.28,162.80,138.49,138.24,132.28,130.97,129.75,129.71,128.89,128.30,127.10,123.66.
以上所述的实施例仅仅是对本发明的优选实施方式进行描述,并非对本发明的范围进行 限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案作出的 各种变形和改进,均应落入本发明权利要求书确定的保护范围内。
Claims (10)
2.如权利要求1所述的制备方法,其特征在于:所述环丙烷试剂为N-磺酰基氧杂吖丙啶。
3.如权利要求1所述的制备方法,其特征在于:所述有机碱为二异丙基氨基锂或叔丁醇钾。
4.如权利要求3所述的制备方法,其特征在于:所述有机碱为有机碱为叔丁醇钾。
5.如权利要求1所述的制备方法,其特征在于:所述反应溶剂为THF。
6.如权利要求1所述的制备方法,其特征在于:所述反应温度为-45℃~0℃。
7.如权利要求1所述的制备方法,其特征在于:所述反应时间为1~2小时。
9.如权利要求8所述的制备方法,其特征在于:将所述化合物2与无机碱的丙酮溶液冷却至10℃±5℃,并在<15℃下加入氯乙酰氯,加毕,室温反应2-3小时;体系加水打浆,离心,固体干燥得到化合物3。
10.如权利要求8所述的制备方法,其特征在于:将所述化合物3与HMTM、乙酸铵在无水乙醇条件下回流4-5小时,体系加水打浆,离心,固体干燥得到去甲西泮。
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