共查询到20条相似文献,搜索用时 406 毫秒
1.
2.
3.
4.
目的是合成氯吡格雷的一种重要中间体(S)-( )-邻氯苯甘氨酸甲酯,并将其拆分,得到有旋光活性的产物。方法是通过研究外消旋的邻氯苯甘氨酸甲酯在甲醇和丙酮的混合溶剂中,用L-( )-酒石酸进行拆分的工艺;通过正交试验和条件实验得到了邻氯苯甘氨酸甲酯的拆分工艺是温度30℃,时间5 h,混合溶剂丙酮与甲醇的体积比为1:4,邻氯苯甘氨酸甲酯与L-( )-酒石酸的摩尔比为1:1.1,此时一次性得到产物旋光为88°,产率大于90%;同时还尝试母液的套用,从2-(2-氯苯)甘氨酸开始,该工艺的总收率77.9%,此工艺具有良好的工业前景。 相似文献
5.
氯吡格雷中间体的合成 总被引:2,自引:0,他引:2
以邻氯苯乙酸为原料,合成了抗血小板凝结药氯吡格雷的两种重要中间体α 溴(2 氯)苯乙酸甲酯和α 氯(2 氯)苯乙酸甲酯。邻氯苯乙酸与亚硫酰氯回流1h,得到邻氯苯乙酰氯(Ⅰ);Ⅰ与Br2在130℃下反应2h得到α 溴代邻氯苯乙酰氯(Ⅱ),Ⅱ在三乙胺催化下与甲醇反应1h,得到α 溴(2 氯)苯乙酸甲酯(Ⅲ),总收率93%;Ⅰ与SO2Cl2在124℃下反应得到α 氯代邻氯苯乙酰氯(Ⅳ),然后再与甲醇反应,得到α 氯(2 氯)苯乙酸甲酯(Ⅴ),总收率92%。 相似文献
6.
(S)-邻氯苯甘氨酸是一种具有广泛用途的药物中间体,主要用于抗血小板聚集药物氯吡格雷的合成,其制备方法主要包括外消旋体拆分法和不对称合成法.重点对(S)-邻氯苯甘氨酸的制备方法进行了介绍,并比较了不同制备技术的优缺点,最后对(S)-邻氯苯甘氨酸的催化合成前景进行了展望. 相似文献
7.
以(R)-(-)-邻氯扁桃酸为原料合成中间体(R)-2-(4-硝基苯磺酰氧基)-2-(2-氯苯基)乙酸甲酯,以2-噻吩乙胺为原料合成中间体4,5,6,7-四氢噻吩并[3,2-c]吡啶盐酸盐,以上两种中间体缩合得氯吡格雷,产物光学纯度(e.e.%)99%。通过正交试验设计方法考察反应温度、反应溶剂和投料比对氯吡格雷e.e.%的影响。结果表明,温度对反应的影响最大,优化后工艺条件:反应温度为25℃,丙酮为溶剂,投料比为1.3∶1。在该条件下,缩合产率为91.6%,氯吡格雷的e.e.%99%,有效解决了氯吡格雷光学纯度问题,且工艺简单易行、重现性好、适合工业化生产。 相似文献
8.
9.
以外消旋的邻氯苯甘氨酸为起始原料,通过酯化得到外消旋的邻氯苯甘氨酸甲酯,再用(L)-(+)-酒石酸拆分,丁酮作为溶剂,拆分消旋同步进行得到(S)-(+)-邻氯苯甘氨酸甲酯,总体收率在95%以上。 相似文献
10.
11.
12.
13.
以3-噻吩硼酸和2-溴噻唑为原料,以Pd(PPh3)4为催化剂,通过Suzuki偶联反应合成了2-(3'-噻吩基)噻唑,考察了不同的碱,不同的溶剂,不同原料比例和不同催化剂比例对该Suzuki偶联反应产率的影响.结果显示:目标产物收率在溶剂为乙醇,K2CO3为碱,原料比例为1.5:1的时候最高,且反应时间较短. 相似文献
14.
(S) 2 氨基 4 (甲硫基)丁酸甲酯盐酸盐于浓氨水中,发生酰胺化反应,制得(S) 2 氨基 4 (甲硫基)丁酰胺,收率63%;(S) 2 氨基 4 (甲硫基)丁酰胺用甲醇溶解,与浓盐酸成盐,得(S) 2 氨基 4 (甲硫基)丁酰胺盐酸盐,收率66%;(S) 2 氨基 4 (甲硫基)丁酰胺盐酸盐在相转移催化剂四丁基溴化铵(TBAB)及研细氢氧化钾的作用下,与4 氯丁酰氯发生取代、环化反应,制得(S) 4 (甲硫基) 2 [2 羰基 1 吡咯烷基]丁酰胺,收率61%。产品的结构经TLC、IR、1HNMR等进行了表征。 相似文献
15.
Xuemei Ma Wenjun Wu Qiong Zhang Fuling Guo Fanshun Meng Jianli Hua 《Dyes and Pigments》2009,82(3):353-359
Three, novel, fluoranthene-based dyes, 2-cyano-3-(5-(7,12-diphenylbenzo[k]fluoranthen-3-yl)thiophen-2-yl)acrylic acid, 2-(5-((5-(7,12-diphenylben-zo[k]fluoranthen-3-yl)thiophen-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)acetic acid and 2-cyano-3-(4-(2-(7,12-diphenylbenzo[k]fluoranthen-3-yl)ethynyl) phenyl) acrylic acid, were synthesized for application as sensitizers in dye-sensitized solar cells. In each dye, the 7,12-diphenyl-benzo[k]fluoranthene moiety acted as electron donor with phenyl and thiophene units as electron spacers and carboxylic acid as electron acceptor. Tuning of the HOMO and LUMO energy levels was conveniently accomplished by changing the spacer and acceptor moiety, as confirmed using electrochemical measurements. Maximum solar energy:electricity conversion efficiency was 4.4% under AM 1.5 solar simulator (100 mW cm?2) for 2-cyano-3-(5-(7,12-diphenylbenzo[k]fluoranthen-3-yl)thiophen-2-yl)acrylic acid. The results suggest that dyes based on fluoranthene donor are promising candidates for high performance, dye-sensitized solar cells. 相似文献
16.
以2-溴-1-(2-噻吩)-1-乙酮和对-甲基苯甲胺为原料,在复合催化剂碘与叔丁基过氧化氢的作用下,通过氧化环合反应合成了5-(2-噻吩)-2-对-甲苯基噁唑。产物结构经FTIR,NMR 和MS检测。结果显示:合成产物的最佳条件为:2-溴-1-(2-噻吩)-1-乙酮1 mmol、对-甲基苯甲胺1.3 mmol、碘0.2 mmol、质量分数55%的叔丁基过氧化氢1.2mmol、碳酸氢钠1.0 mmol,室温下反应12 h,产物收率为89.7 %。抑菌圈测定结果显示该产物对大肠杆菌具有强的抑菌能力。 相似文献
17.
Conjugated polymers were synthesized and used for polymer solar cells with new electron-rich units, 6-(2-thienyl)-4H-thieno[2,3-b]indole (2-TTI). 2-TTI was coupled with electron-pulling units, including benzothiadiazole and benzimidazole derivatives, to provide push–pull types of conjugated polymers (poly(8-(heptadecan-9-yl)-6-(thiophen-2-yl)-8H-thieno[2,3-b]indole)-alt-(2-methyl-5,6-bis(octyloxy)-4,7-di(thiophen-2-yl)-2-(trifluoromethyl)-2H-benzimidazole) (PTTIDOCF3), poly(8-(heptadecan-9-yl)-6-(thiophen-2-yl)-8H-thieno[2,3-b]indole)-alt-(5,6-bis(octyloxy)-4,7-di(thiophen-2-yl)-2,1,3-benzothiadiazole) (PTTIDOBT), poly(8-(heptadecan-9-yl)-6-(thiophen-2-yl)-8H-thieno[2,3-b]indole)-alt-(2,2-dimethyl-4,7-di(thiophen-2-yl)-2H-benzimidazole) (PTTIMBI), and poly(8-(heptadecan-9-yl)-6-(thiophen-2-yl)-8H-thieno[2,3-b]indole)-alt-(2,2-dimethyl-5,6-bis(octyloxy)-4,7-di(thiophen-2-yl)-2H-benzimidazole) (PTTIDOMBI)). The synthesized conjugated polymers provided deep highest occupied molecular orbital energy levels for higher open-circuit voltages (VOC). The device composed of PTTIDOMBI and [6,6]-Phenyl C71 butyric acid methyl ester PC71BM (1:2) with chloronaphthalene additive showed a VOC of 0.72 V, a short-circuit current (JSC) of 9.16 mA/cm2, and a fill factor of 0.43; this gave a power conversion efficiency (PCE) of 2.84%. The PTTIDOMBI provided better morphology for enhanced charge transport, and this led to the higher JSC and PCE of the organic solar cells. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47624. 相似文献
18.
A new series of processable conducting polymers based on thienylpyrrole was synthesized by electrochemical polymerization of 1-(1-naphthyl)-2,5-di(thiophen-2-yl)-1H-pyrrole, 1-(2-naphthyl)-2,5-di(thiophen-2-yl)-1H-pyrrole, 1-(9H-fluoren-2-yl)-2,5-di(thiophen-2-yl)-1H-pyrrole and 1-(benzo-15-crown-5)-2,5-di(thiophen-2-yl)-1H-pyrrole. The corresponding polymers have very well-defined and reversible redox processes in both organic and aqueous solutions. Furthermore, they exhibit multielectrochromic behavior: yellow in the neutral state, green and blue in the intermediate state and violet in the oxidized state. The polymer products are soluble in organic solvents and all of them are fluorescent. 相似文献
19.
20.
新法合成杀虫剂氯虫酰胺 总被引:5,自引:0,他引:5
氯虫酰胺是2000年由杜邦公司报道的新型邻甲酰氨基苯甲酰胺类杀虫剂。其作用机理独特,属鱼尼丁受体抑制剂。该杀虫剂不仅对鳞翅目类有较好的活性。与现有杀虫剂无交互抗性,而且对哺乳动物很安全,于2007年首次在菲律宾获准登记并销售。 相似文献