有机颜料中间体N—（3‘—氨基—4’—氯代）苯甲酰基—2—甲基—3—？…

以４－氯甲苯为原料，经过氧化，硝化，缩合，还原反应，制成有机颜料中间体Ｎ－（３’－氨基－４‘－氯代）苯甲酰基－２－甲基－３－氯代苯胺，对影响反应的诸因素了讨论，产品总收率为５７．４％。     

2-氯-N-(2-氯-4-甲基-3-吡啶基)-3-吡啶甲酰胺合成工艺改进

介绍了以4-甲基-3-氨基-2-氯吡啶(CAPIC)和2-氯烟酸合成2-氯-N-(2-氯-4-甲基-3-吡啶基)-3-吡啶甲酰胺的方法,并选择出了最优惠条件,反应最佳投料比为n(4-甲基-3-氨基-2-氯吡啶)∶n(2-氯烟酸)∶n(POCl3)∶n(Et3N)=1∶1∶1∶1.1,反应温度81℃,反应时间3.5 h,产品收率90.3%,纯度为99.5%。     

3，4-二甲基-2’-氯代苯乙酮的合成

以邻二甲苯和氯乙酰氯为原料,采用金属负载型催化剂,经Friedel-Crafts酰基化反应过程合成了3,4-二甲基-2'-氯代笨乙酮,讨论了负载型催化剂的用量、原料配比、温度、反应时间等对反应的影响.结论如下:负载型催化剂用量为ω=0.25%(与邻二甲苯质量比),反应时间3h,反应温度80℃,收率大于90%.产品经红外光谱和液色谱相确认为3,4-二甲基-2'-氯代苯乙酮.     

5-三氟甲基-2-氯-4-吡啶硼酸的合成研究

采用2-氯-4-碘-5-三氟代甲基吡啶为起始原料,与正丁基锂溶液反应制备5-三氟甲基-2-氯-4-吡啶硼酸。实验研究了合成反应过程几种反应条件对合成产率的影响情况,采用HPLC,FTIR,1 H NMR等方法对产品的纯度和结构进行了分析表征。实验结果表明:当反应温度为-70℃,反应时间为2h,反应物料配比n(2-氯-4-碘-5-三氟代甲基吡啶)∶n(硼酸三丁酯)∶n(正丁基锂)为1.00∶1.20∶1.20,溶液pH值为9.0时,5-三氟甲基-2-氯-4-吡啶硼酸的收率为83.10%,纯度可达98.65%以上。     

3-氯-3-甲基丁炔的合成

探讨了以3-羟基-3-甲基丁炔为原料合成3-氯-3-甲基丁炔的工艺,并考察了反应条件对3-氯-3-甲基丁炔收率的影响.通过正交实验确定了最佳工艺条件:3-羟基-3-甲基丁炔23.5 g,浓盐酸28 mL,浓硫酸18 mL,反应温度30 ℃,催化剂ZnCl2 2 g,该合成工艺收率可达83%以上.     

6-氟-7-氯-1,4-二氢-4-氧代喹啉-3-羧酸乙酯及其类似物的合成

采用微波辐射方法替代传统加热方法,由3-氯-4-氟苯胺与乙氧甲叉丙二酸二乙酯(EMME)经缩合、环合或一步合成生成6-氟-7-氯-1,4-二氢-4-氧代喹啉-3-羧酸乙酯.     

1-芳基-3-苯甲酰基-2-硫代咪唑啉-4-酮的合成

1-芳基-3-苯甲酰基硫脲与氯乙酰氯反应合成了1-芳基-3-苯甲酰基-2-硫代咪唑啉-4-酮,产物结构经红外光谱、核磁共振光谱和质谱数据确证。     

3-氯-3-(4-苄氧基)-3-苯丙烯醛的合成

目的:以苯酚为原料,经酯化、Fries重排、烷基化、Vislsmeier反应等,合成3-氯-3-(4-苄氧基)-3-苯丙烯醛.方法:查阅、分析、归纳相关文献,设计出3-氯-3-(4-苄氧基)-3-苯丙烯的合成路线,运用化学合成法合成该目标产物,并检测其纯度.结果:通过实验研究,合成了-3-氯-3-(4-苄氧基)-3-苯丙烯醛.结论:3-氯-3-(4-苄氧基)-3-苯丙烯醛的熔点为88～90℃,收率76.9%,纯度98.21%.     

6-氯吡啶-3-甲醛的简便合成

根据Komblum反应原理,采用二甲亚砜(DMSO)氧化2-氯-5-氯甲基吡啶,一步反应得到6-氯吡啶-3-甲醛．考察了反应时间、反应温度和催化剂用量等因素对产物收率的影响,确定了较佳反应条件：2-氯-5-氯甲基吡啶加mmol,碳酸氢钠40mmol,碘化钾10mmol,DMSO100mL,反应时间8h,反应温度100℃,产物收率可达到76．2％．     

（顺）-3-（氯代亚甲基）-6-氟-硫色满-4-酮抗肿瘤机理初步研究

目的研究（顺）-3-（氯代亚甲基）-6-氟-硫色满-4-酮（（z）-3-（chloromethylene）-6-fluorothiochroman-4-one,CMFT）体外抗BGC-823肿瘤细胞机理。方法采用流式细胞仪检测BGC-823肿瘤细胞周期和凋亡。结论 CMFT能够抑制BGC-823细胞周期并诱导细胞发生凋亡。     

N-(-3''''-氨基-4''''-溴代)苯甲酰-2-甲基-5-溴代苯胺的合成

以4-溴甲苯为初始原料,经过氧化,硝化,缩合,还原反应,制成有机颜料中间体N-(3'-氨基-4'-溴代)苯甲酰-2-甲基-5-溴代苯胺.对影响反应的各种因素进行了讨论,产品总收率为57.8%.     

5,7-二羟基黄酮的合成工艺改进

间苯三酚(2)与乙腈发生Hoesch反应，合成中间体2’，4’，6’-三羟基苯乙酮(3)；然后在相转移催化剂TEBA存在下，与苯甲酰氯缩合，得到中间体1-(2’，4’，6’-三羟苯基)-3-苯基-1，3-丙二酮(4)，4不经过分离，一锅法直接重排和关环合成5’，7’-二羟基黄酮(1)，总收率为68．4％，比文献提高8％。     

二噻吩并[2,3-b:3'''',2''''-d]噻吩与二噻吩并[3,2-b:2'''',3''''-d]噻吩单醛与双醛的合成

二噻吩并[2,3-b:3',2'-d]噻吩单醛与双醛的制备首先通过两种方法产生芳基负离子:1)溴代并三噻吩在四氢呋喃中与正丁基锂发生的溴锂交换;2)用LDA对二噻吩并[2,3-b:3',2'-d]噻吩去质子化作用.其后经无水DMF猝灭制备出目标化合物.并利用正丁基锂对二噻吩并[3,2-b:2',3'-d]噻吩进行去质子化,从而制备相应的单醛与双醛产物.通过红外、核磁、质谱、高分辨质谱以及元素分析等手段对目标产物进行了表征.     

对称二呋喃羟基乙酮与DMF/POCl3反应的研究

用对称二呋喃羟基乙酮和POCl3-N，N-二甲基甲酰胺（DMF）作原料合成得到了化合物5-氯代糠醛-2ˊ-呋喃基酮和化合物5-甲酰基-2，2ˊ-联糠醛。通过元素分析，IR，^1HNMR等手段对产物进行了表征。     

Detecting chimeric 5''''l3''''UTRs with cross-chromosomal splicing by bioinformatics

The 5'/3' UTRs of mRNA are crucial in transla-tional regulation, and several serious diseases are believed tobe associated with abnormal splicing of these parts of themRNA sequence. In this work a novel method which usessequence alignment database searching for detecting chi-meric 5'3' UTRs with cross-chromosomal splicing is reported.Eight highly credible instances of cross-chromosomal splic-ing have been found using this method, representing addi-tional confirmation of the existence of cross-chromosomalsplicing events provided by bioinformatics tools. Since noconserved motif has been found in any of the eight instances,and at the same time current prediction algorithms produceonly trivial secondary structures at the "splicing sites", it isnot possible to identify any specific signal leading to thesplicing.     

2‘,3’—双脱氧核苷合成方法的研究

提出一种新的2’,3’—双脱氧核苷类抗艾滋病药物的合成路线,以四氢呋喃甲醇为原料制备双脱氧核苷的合成方法.通过对映体拆分,用D—樟脑—10—磺酰氯成功地从四氢呋喃甲醇中拆分出(S)—异构体,得到光学纯度90％以上的(S)—乙酸四氢呋喃甲酯.用~1H—NMR法研究了乙酸四氢呋喃甲酯的自由基氯化反应,合成了一种新的制备2’,3’—双脱氧核苷的中间体5—0—乙酰基—2,3—双脱氧—D—呋喃戊糖基氯.对其反应时间、反应温度、反应物摩尔比对反应产物的影响,进行了测定,获得了最适宜的反应条件,使产率从10％提高到50%,并讨论了该中间体与核苷碱基进一步缩合获得2’,3’—双脱氧核苷的可行性.     

Study on the micro-region structure and properties of two dithienothiophene-dicarboxylic acids

Self-organized dithieno [3,2-b:2',3'-d] thiophene-2,5-dicarboxylic acid (A) and dithieno [2,3-b:3',2'-d] thiophene-2,5-dicarboxylic acid (B) films were prepared through solvent-induced order-disorder transition method.The arrangement of the two molecules on substrates were observed by atomic force microscopy (AFM),which demonstrated that A was arranged orderly in a certain angle on mica,while B was flat-flying on mica.The optical and conductance properties in micro region of these two compound films were ch...     

Cloning and characterization of vernalization-related gene (ver203F) cDNA 3' end

Based on the cDNA fragment sequence of vernalization-related gene verc203 cloned by differential screening in our lab, the 5' primer has been designed. The cDNA 3' end of ver203 gene (1 197 bp) has been cloned by the RACE method. And it is identified by Northern blotting that its expression is special in vernalization treatment. After comparing the sequence in the nucleotide sequence databases of Genbank, EMBL and DDBJ, the gene has homology with Hordeum vulgare jesmonate-induced protein gene. It is suggested that this gene might be related to the signal transduction mediated by jamonate.     

Detecting chimeric 5′／3′UTRs with cross-chromosomal splicing by bioinformatics

The 5′/3′ UTRs of mRNA are crucial in translational regulation, and several serious diseases are believed tobe associated with abnormal splicing of these parts of the mRNA sequence. In this work a novel method which usessequence alignment database searching for detecting chimeric 5′/3′ UTRs with cross-chromosomal splicing is reported.Eight highly credible instances of cross-chromosomal splicing have been found using this method, representing additional confirmation of the existence of cross-chromosomal splicing events provided by bioinformatics tools. Since noconserved motif has been found in any of the eight instances,and at the same time current prediction algorithms produceonly trivial secondary structures at the “splicing sites“, it isnot possible to identify any specific signal leading to the splicing.     

7-表-10-去乙酰基三尖杉宁碱的HPLC分析方法及其溴化产物的抗癌活性研究

分别在C18柱和Metachem Taxsii-3紫杉醇专用柱上研究了云南红豆杉粗提物中紫杉醇(1)、三尖杉宁碱(2)、7-表-10-去乙酰基紫杉醇(3)和7-表-10-去乙酰基三尖杉宁碱(4)的反相色谱行为．在Metachem Taxsil-3紫杉醇专用柱上,水：乙腈(54:46)的流动相使这四种色谱行为相近的化合物获得了基线分离．使用溴化法处理含有(2)和(4)的红豆杉粗提物,通过分离纯化得到了二溴-7-表-10-去乙酰基三尖杉宁碱的两个非对映异构体(5和6)．体外活性实验结果表明,5和6对于人乳腺癌(MCF-7)、人肺癌(A549)和人卵巢癌的体外毒性比紫杉醇略强．