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1.
以炔诺酮中间体面△~(5(10))-雌甾-3,17-二酮-3,3-双甲醚(4)和消旋18-甲基炔诺酮中间体dl-18-甲基-△~(2(3),5(10))-雌甾-二烯-17-酮-3-甲醚(5)为原料,在四甲基氟化铵催化下和三氟甲基三甲基硅烷(TMSCF_3)发生羰基亲核加成反应,硅醚中间体分别经多步反应合成含三氯甲基的甾体化合物1a,b,2a,b和3a,b.总产率分别为82%,76%,54%,62%和27%,25%.17位三氟甲基经X-单晶衍射证明处于α-位.化合物1a,2a和3a经初步药理测试显示具有良好的抗生育活性.特别是化合物1a,对大鼠子宫胞液孕酮受体的亲和力是米非司酮(RU 486)的3倍.化合物1b,2b和3b的药理测试正在进行之中. 相似文献
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以聚甲醛为羟甲基化试剂,研究了碱的种类、反应温度和反应时间等因素对芴与聚甲醛发生羟甲基化反应产物类型的影响。 结果表明,提高碱的强度有利于生成9,9-双羟甲基芴,升高温度和延长反应时间则有利于生成9,9′-亚甲基双芴。 通过控制反应条件,有可能优先生成9-芴甲醇或9,9-双羟甲基芴或联产这2个化合物。 相似文献
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《有机化学》2017,(6)
设计合成了5个新型二茂铁噻唑和咪唑衍生物,其特点是二茂铁共轭单元与杂环共轭单元之间用羰基亚甲基(COCH_2)相连.以二茂铁为原料,经氯乙酰化反应生成氯乙酰基二茂铁(1a),1a分别与不同的杂环化合物(2-巯基苯并噻唑、2-巯基苯并咪唑、咪唑和苯并咪唑)反应生成相应的四种新化合物;二茂铁经乙酰化、溴代反应生成1,1'-二(溴乙酰基)二茂铁(1b),1b与2-巯基苯并噻唑反应生成1,1'-二茂铁二[(2-苯并噻唑-2-硫基)-1-乙酮](2e).五种新化合物的结构都经~1HNMR,~(13)CNMR,ESI-MS,HRMS和IR确认,并得到3个化合物的X射线单晶结构.利用紫外-可见光谱研究了5个新化合物对14种金属离子的识别性质,发现这5个化合物只对Fe~(3+)离子具有离子识别作用,其中2a具有最大的吸收光谱响应. 相似文献
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新型桥连双卟啉化合物的合成及结构表征 总被引:7,自引:2,他引:5
通过将4,4′-二羧基-2,2′-联吡啶、2,6-二溴甲基吡啶、2,6-二羟甲基吡啶和1,8-二氨基萘分别与5-(4-羟基苯基)-10,15,20-三苯基卟啉(1a)、5-(4-甲酰苯基)-10,15,20-三苯基卟啉(1b)和5-[4-(4′-溴代丁氧基)苯基]-10,15,20-三苯基卟啉(1c)反应,合成了3类新型的双卟啉化合物2a-2e,经IR,1HNMR,MS,UV-Vis光谱及元素分析对中间体和目标化合物的结构进行了表征. 相似文献
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《高等学校化学学报》2018,(11)
从2种氧原子桥联双膦化合物双(2-二苯基膦苯基)醚(1a)和4,5-双(二苯基膦)-9,9-二甲基氧杂蒽(1b)出发,合成氧原子桥联双膦亚胺钛、镍配合物.在甲苯中回流条件下首先将化合物1a和1b与叠氮三甲基硅烷发生Staudinger反应,分别生成单和双膦亚胺前驱体2a和2b.然后再与环戊二烯基三氯化钛反应,脱去三甲基氯硅烷后得到相应膦亚胺过渡金属钛配合物3a和3b.单钛中心配合物3b进一步与乙二醇二甲醚溴化镍反应生成钛-镍异核双中心配合物4b.通过1H NMR,13C NMR,31P NMR,FTIR及元素分析对产物进行了表征,并利用X射线单晶衍射分析确定了配合物3a和3b的分子结构.在助催化剂甲基铝氧烷(MAO)作用下,配合物3a和4b对乙烯聚合均表现出较高的催化活性,其中双钛中心配合物3a催化得到较宽分子量的聚乙烯产物,而异核双中心配合物4b催化得到呈双峰分布的聚乙烯产物. 相似文献
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雌甾酚酮(la)和雌甾酚醇(lb)是治疗妇科病的要药。其17位的乙炔衍生物乙炔雌二醇(lc)及其3-甲醚化合物ld是甾体口服避孕药的组分。7α-甲基-雌甾酚酮(le)的生理活性比la大2~3倍,7α-甲基-乙炔雌二醇(lf)的生理活性比lb大20倍。文献报道le或7α-甲基-雌甾酚醇(lg)是由7α-甲基-△~(1,4)-3-酮或7α-甲基-△~4,6-3-酮及其相应的19-失碳甾体化合物经高温或经酸重排等方法制得;也有用节杆菌转化7α-甲基-19-失碳睾丸素而制得。所有这些合成方法不仅步骤多,而且得率往往不佳。本文报道 相似文献
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G. A. Gazieva P. V. Lozhkin A. N. Kravchenko 《Chemistry of Heterocyclic Compounds》2007,43(11):1406-1410
The α-ureidoalkylation of imidazolidine-2,4-dione, urea, carboxylic acid amides, and sulfonamides has been studied using 1,3-bis(hydroxymethyl)-imidazolidin-2-one
as ureidoalkylating agent. Methods have been developed for the synthesis of 1,3-bis(2,4-dioxoimidazolidin-1-ylmethyl)-, 1,3-bis(acetylaminomethyl)-,
1,3-bis(benzoylaminomethyl)-, 1,3-bis(phenylsulfonylaminomethyl)-, and 1,3-bis(p-toluenesulfonylaminomethyl)imidazolidin-2-ones.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1655–1659, November, 2007. 相似文献
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V.Ya Sosnovskikh D.V SevenardB.I Usachev G.-V Röschenthaler 《Tetrahedron letters》2003,44(10):2097-2099
Reactions of 2-perfluoroalkylchromones with (perfluoroalkyl)trimethylsilanes proceed as a 1,4-nucleophilic perfluoroalkylation to give 2,2-bis(perfluoroalkyl)chroman-4-ones in high yields after acid hydrolysis. Oxidation of 2,2-bis(trifluoromethyl)-6-methylchroman-4-one with K2S2O8 leads to fluorinated analogs of natural lactarochromal and the corresponding acid. 相似文献
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Mohamed I. Hegab 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1):137-148
Abstract Six new hindered α,β-unsaturated ketones (22c-h) were prepared. Though the reaction of α,β-unsaturated ketones (22a,b) with 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphet-ane-2,4-disultide (23) in refluxing benzene gave the corresponding 2-arylidene-1-thiotetral-one dimers (26a,b) and 3H-1,2-thiaphospholene-2-sulfides (28a,b), the reaction of hindered α,β-unsaturated ketones (22d-h) with 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphet-ane-2,4-disultide (23) in retluxing benzene gave only identified 3H-1,2-thiaphospholene-2-sulfides (28c-g). 相似文献
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S. M. Ramsh A. G. Ivanenko V. A. Shpilyovy N. L. Medvedskiy P. M. Kushakova 《Chemistry of Heterocyclic Compounds》2004,40(7):919-926
2-(Het)aryl derivatives of 2'-aminospiro[(1,3-dioxane)-5,5'-thiazolin]-4'-one or spiro[(1,3-dioxane)-5,5'-thiazolidine]-2',4'-dione are formed by the acid catalyzed interaction of 2-amino-5,5-bis(hydroxymethyl)-4-thiazolinone or its oxo analog 5,5-bis(hydroxymethyl)thiazolidine-2,4-dione with (hetero)aromatic aldehydes. 相似文献
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Selected imines reacted with hexafluoroacetone non-catalyzed at ambient temperature to give β-hydroxy-β-bis(trifluoromethyl) imines in good to excellent yields. For the imines of acetone, pentan-3-one, and of cyclohexanone a 1:2 reaction was observed giving iminodiols; for N,N′-bis(propylidene)ethylene diamine an iminotetrol was formed. The diol derivative of N-isopropyl-propylidene amine could be deprotonated and O-methylated furnishing the respective ethers. Hexafluoropropylidene amine reacted with N-isopropyl-propylidene amine, unlike hexafluoroacetone, in a 1:1 manner to form an amino-imino alcohol which in its turn is able to add hexafluoroacetone. The imines of acetophenone, trifluoroacetone, 2,4-dimethyl-pentan-3-one, 2,6-dimethyl-cyclohexanone and of acetaldehyde added hexafluoroacetone to furnish β-iminoalcohols. A multifunctional β-hydroxy enaminone was obtained from 4-isopropylamino-pent-3-en-2-one. The molecular structures of the novel β-hydroxy-β-bis(trifluoromethyl) imines exhibit strong (R)N?HO hydrogen bonds. 相似文献
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周其凤等曾报道聚丙烯酸[2,5-双(对甲氧基苯甲酰氧基)节酯][1]和聚甲基丙烯酸[2,5-双(对甲氧基苯甲酰氧基)苄酯][2]的合成.但后来的研究发现,在合成单体的条件下出现的一种未见报道的异常反应[3]使产物成分复杂化,因此当时报道的聚合物可能不是聚丙烯酸[2,5-双-(对甲氧基苯甲酰氧基)苄酯]或聚甲基丙烯酸[2,5-双(对甲氧基苯甲酰氧基)苄酯],而可能是共聚物.针对这一问题,我们重新设计了合成路线以避免发生上述副反应,成功地合成了丙烯酸或a-甲基丙烯酸[2,5-双-(对甲氧基苯甲酰氧基… 相似文献
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A series estrogen-imidazolium cyclophanes have been synthesized for the first time by direct quaternization of 2,4-bis(N-imidazolylmethyl)estrogens and corresponding dibromides in highly diluted acetonitrile solution in excellent yields. All new compounds were characterized by MS, 'HNMR and elemental analysis. 相似文献
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《Analytical letters》2012,45(13):2145-2158
Abstract We report a sensitive high performance liquid chromatography (HPLC) method for determination of free and conjugated estrogens (estrone, estradiol and estriol) by a fluorescent pre-labeling regent, 2-(4-carboxyphenyl)-5,6-dimethylbenzimidazole, with modification of previous work. The modified method was also tried, in preliminary work, for diagnosis of the in-vitro fertilization embryo transfer (IVF-ET) process. The reagent volumes were changed to one-tenth, derivatization conditions were changed to mild conditions at 40 C, and a solid-phase extraction process by SEP-PAK could be omitted after restudy of reaction conditions. As a result analysis time could be shorted within 40 min. The proposed HPLC method was applied to monitoring of free and conjugated estrogens in the patients who attend in-vitro fertilization embryo transfer (IVF-ET). The subsequent increase of free and conjugated estrone, estradiol and estriol was observed with the progress of follicle growth following ovulation stage in the IVF-ET process. We tried to plot estrogens for assist of clinical diagnosis of IVF-ET. The free estrone: 200-600 pg/ml, estradiol: 200-600 pg/ml and estriol: 100-300 pg/ml, conjugate estrone: 1000-5000 pg/ml, estradiol: 3000-8000 pg/ml and estriol: 2000-7000 pg/ml) in the patients without hormone disease were observed before human chorionic gonadotropin stimulation (hCG) on IVF-ET process. It was expected that free estrogen values, especially E1 and E3 could be use as validation products for diagnosis of hormone disease in IVF-ET process. 相似文献
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1 INTRODUCTION -Thiocarbonylthioformamide synthesized in 1980[1, 2] is a class of stable and almost unexplored compounds[3]. We have reported the reaction of - thiocarbonylthioformamides in our previous paper[4]. Here, we will report a novel synthesis of 2 by the reaction of 1 and trimethyl phosphite in refluxing xylene. In order to determine the structure of 2, X- ray crystallographic study was carried out. 2 EXPERIMENTAL 2. 1 Preparation of the title compound Trimethyl phosph… 相似文献