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(S)-2-氨基-1,1-二苯基-1-丙醇是一种合成多种手性助剂的重要中间体,也用于外消旋屈昔多巴前体化合物的拆分。从价廉易得的L-丙氨酸出发,通过四步反应制得,总收率55.6%L-丙氨酸经甲酯化,苄氧羰基保护制得的L-2-苄羰基氨基丙酸甲酯与苯基溴化镁反应制得(S)-2-苄氧羰基氨基-1,1-二苯基-1-丙醇。是在5%Pd/C催化加氢下脱除苄氧羰基得到标题化合物。该制备方法涉及的中间体及目标化合物易于纯化,总收率高且重现性好。我们用制得的氨基醇能成功地拆分外消旋苏式屈昔多巴前体化合物3-3,4-二苄氧苯基)-N-苄氧羰基丙氨酸。 相似文献
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报道了一种合成β-甘油磷酸(β-3)的新方法。在相转移催化剂的作用下,环氧氯丙烷与苄醇反应制得1,3-二苄氧-2-丙醇(1);1与五氧化二磷缩合后经氢化脱苄合成了β-3,纯度98%,总产率62%,其结构经31P NMR确证。并解释了脱苄反应过程中磷原子的邻位迁移现象。 相似文献
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本文设计一条新的合成路线,以价廉的异香兰素、间苯二酚为起始原料,通过Dakin反应、乙酰化、酚羟基醚化等系列反应得到目标化合物1-(2,4二异丙基氧基苯基)乙酮(5b)和新化合物1-(2,4二异丙基氧基-5-甲氧基苯基)乙酮(5a)。通过对化合物(5a)进行条件因素探索,得出合成(5a)的最佳反应条件,并通过1H NMR、MS、熔点等技术手段对其进行结构的确认与表征。 相似文献
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4-(2-苄氧基乙氧基羰基)氧杂环丁-2-酮的合成及表征 总被引:6,自引:0,他引:6
通过16例人肺鳞癌和小细胞肺癌组织中表达蛋白的二维电泳分离和质谱分析,经数据库检索鉴定了53个蛋白,其中24个蛋白与肺癌发病机制相关,4个蛋白在其它癌症中有报道,表达呈现差异的蛋白点有44个,其中34个在表达量上有差异,lO个蛋白在鳞癌和小细胞癌间表现为有和无的关系,蛋白功能分析提示人肺鳞癌与小细胞癌的蛋白质组表达存在差异,分析这些差异蛋白有利于肺癌分型及其生物标志物研究。 相似文献
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U. M. Dzhemilev A. G. Ibragimov M. N. Azhgaliev R. R. Muslukhov 《Russian Chemical Bulletin》1994,43(2):255-257
A one-pot stereoselective method was developed for the synthesis oftrans-3,4-dialkyltetrahydrothiophenes from -olefins, EtAlC2, metallic magnesium, and elementary sulfur (S8) in the presence of catalytic amounts of Cp2ZrCl2.For part 13, see Ref. 1.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 276–278, February, 1994. 相似文献
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V. P. Balema E. G. Rys N. N. Godovikov A. V. Polyakov Yu. T. Struchkov 《Russian Chemical Bulletin》1992,41(1):147-152
S-(o-Carboran-9-yl) diphenylthiophosphinite was obtained for the first time, and its structure and transformations were studied. A series of esters of thio- dithio-and selenothiophosphinic acids have been synthesized and complexes of tungsten and manganese were obtained containing the carboranylthiophosphinite ligand.A. N. Nesmeyanov Institute of Heteroorganic Compounds, Russian Academy of Sciences, 117813 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 1, pp. 180–186, January, 1992. 相似文献
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Young Jin Cho Seung Hwan Lee Jong Woo Bae Sung Hoon Kim Sam Rok Keum Cheol Min Yoon 《合成通讯》2013,43(12):2205-2211
The 7-acetoxyspiropyrans (4a and 4b) have been prepared by the reaction of Fischer's bases (3) with 2,4-diacetoxybenzaldehyde in refluxing ethanol in moderate yields. The acetyl group of 7-acetoxy-spiropyran 4a was easily removed to give a 7-hydroxyspiropyran 6 in high yield under the basic condition. 相似文献
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The title compound 2-(spirobifluorene-2-yl)-3,4-diaza-spirobifluorene(C48H28N2,Mr = 632.72) has been synthesized and characterized by 1H NMR,13C NMR and single-crystal X-ray diffraction.The crystal crystallizes in the monoclinic system,space group Cc with a = 13.8523(6),b = 29.3297(13),c = 8.6397(4) ,β = 111.8760(10)°,V = 3257.4(3) 3,Z = 4,Dc = 1.290 mg/m3,μ = 0.075 mm-1,F(000) = 1320,the final R = 0.0425 and wR = 0.1110 for 5288 observed reflections(Ⅰ 2σ(Ⅰ)). 相似文献