齐格勒-纳塔催化剂内给电子体1,1-双(甲氧甲基)环己烷的合成

以环己酮为起始原料,经Darzens反应、水解酸化、脱羧重排、缩合歧化及醚化反应合成了1,1-双(甲氧甲基)环己烷,并考察了反应中原料物质的量的比、脱水剂无水Na2SO4用量等关键因素的影响。在适宜的反应条件下,以环己酮计,目标产品的总收率为61.6%,气相色谱纯度为95.3%。1H-NMR分析表明所获产品结构正确。     

1,1-二甲硫基-2-硝基乙烯的合成

研究了以硝基甲烷和二硫化碳为原料,合成1,1-二甲硫基-2-硝基乙烯。考察了反应温度、反应时间、甲基化试剂、溶剂、投料比等对于反应产物的影响,得到优化工艺条件为:反应温度35℃,反应时间3h。以硫酸二甲酯为甲基化试剂,常温下反应时间3 h,重结晶得1,1-二甲硫基-2-硝基乙烯,收率为84%,产物通过IR、1H-NMR鉴定。     

2-丁二酸单乙酯酰基-9,9-双甲氧甲基芴的制备

以芴为主要原料,经过醚化、酯化和Friedel-Crafts酰基化等反应,合成出了9,9-双羟甲基芴、9,9-双甲氧甲基芴、丁二酸单乙酯和丁二酸单乙酯酰氯4种中间体,并最终合成出目的产物2-丁二酸单乙酯酰基-9,9-双甲氧甲基芴。采用核磁共振对中间体和目的产物的结构进行了表征和分析。最后以2-丁二酸单乙酯酰基-9,9-双甲氧甲基芴为内给电子体合成出新型聚丙烯催化剂,采用丙烯液相本体聚合的方法,对催化剂催化丙烯聚合反应的性能进行了评价。     

2-丁二酸单乙酯酰基-9，9-双甲氧甲基芴的合成与表征

以芴、多聚甲醛和乙醇钠等为主要原料,经过醚化、酯化和Friedel—Crafts酰基化等反应,合成了9,9-双羟甲基芴（BHMF）、9,9-双甲氧甲基芴（BMF）、丁二酸单乙酯和丁二酸单乙酯酰氯（ESC）这4种中间体,最终合成出目的产物2-丁二酸单乙酯酰基-9,9-双甲氧甲基芴,利用傅立叶红外光谱对中间体和目的产物结构进行了分析和表征。     

1,1-双(1H-苯并咪唑-2-基)-1-十三碳烯的合成及其性能

以邻苯二胺和丙二酸为原料,在3 mol/L盐酸催化下合成双(1H-苯并咪唑-2-基)甲烷中间体,然后与月桂醛通过Knoevenagel缩合反应合成了双苯并咪唑衍生物——1,1-双(1H-苯并咪唑-2-基)-1-十三碳烯。利用元素分析、FTIR和~1HNMR对合成产物的结构进行了表征,考察了常规碱催化剂对目标产物收率的影响,并通过UVVis和荧光光谱(FL)测定了目标化合物的光学性能。结果表明:六氢吡啶催化效果最好,产物收率可达76.33%。目标化合物在243、315和361 nm 3处有紫外吸收峰,可有效覆盖日光紫外线UVA和UVB波段;目标化合物溶液在λem=464.5 nm处有蓝紫色荧光,固体薄膜在λ_(em)=476.5 nm处有蓝紫色荧光,荧光量子产率为0.47。标题化合物荧光增白效果与常用荧光增白剂VBL相当。     

9,9-双（甲氧基甲基）芴的合成及其应用研究

9,9-双（甲氧基甲基）芴（BMMF）的合成分两步进行：首先,在乙醇钠催化剂的作用下,芴与多聚甲醛反应合成了中间体9,9-双（羟甲基）芴（BHMF）,然后以四丁基溴化铵（TBAB）为相转移催化剂,再与氯甲烷发生烷基化反应合成了9,9-双甲氧基甲基芴。用9,9-双（羟甲基）芴作外给电子体进行了丙烯聚合应用,实验结果表明：9,9-双（甲氧甲基）芴（BMMF）是聚丙烯Ziegler-Natta催化体系较好的外给电子体。     

9,9-双甲氧甲基芴的合成及其光谱分析

以芴为原料,在乙醇钠的催化下,经多聚甲醛羟甲基化反应合成了中间体9,9-双羟甲基芴,然后以四丁基溴化铵为相转移催化剂,再与氢氧化钠、碳酸二甲酯发生烷基化反应,合成了目标化合物。通过紫外光谱、红外光谱和核磁共振谱等分析测试手段对中间体和目标产物进行了结构表征并逐一归属。     

Poly(2,5-(3,4-bis(methoxymethyl)furanylene)vinylene)s prepared by aqueous ring opening metathesis polymerisation

Summary Poly(2,5-(3,4-bis(methoxymethyl)furanylene)vinylene)s of various microstructures, prepared by aqueous Ring Opening Metathesis Polymerisation (ROMP) of exo,exo-5,6-bis(methoxymethyl)-7-oxabicylo[2.2.1]hept-2-ene, were characterised by high field NMR.     

1-叔丁氧羰基-(S)-2-羟甲基氮杂环丁烷的合成

报道了一种合成(S)-2-羟甲基氮杂环丁烷的新方法,即以γ-丁内酯为起始原料,经溴代开环成2,4-二溴丁酸甲酯(■),然后与(S)-α-苯乙胺双取代环化生成氮杂1-[(S)-1-苯乙基]-2-甲氧羰基氮杂环丁烷的两种非对映异构体■(2S,1′S)和■(2R,1′S),经柱层析分离,氢化铝锂还原成醇(■)后,氢解脱去(S)-1-苯乙基和引入Boc保护基生成标题化合物1-叔丁氧羰基-(S)-2-羟甲基氮杂环丁烷。总共4步反应,总收率为40%。~1H NMR和MS表征确证了关键中间体和目标产物结构。     

Syntheses and polymerizations of macromers

Summary Living poly(tetrahydrofuran) (PTHF) was coupled with sodium p-vinylbenzyloxide quantitatively to prepare a macromer of p-vinylbenzyloxyl poly(tetrahydrofuran) (VBO-PTHF). The radical polymerization of the macromer with AIBN was performed. From the GPC measurement the conversion of the macromer to poly-macromer was shown to be high percentage, but the degree of polymerization of poly-macromer was much lower than that expected in the case of regular monomers such as styrene.     

(S)-(+)-5-羟甲基-2-吡咯烷酮的合成方法改进

通过实验证明在(S)-( )-5-羟甲基-2-吡咯烷酮合成中，以硼氢化钠为还原剂时，所得产品产率和纯度都有大幅度提高；且实验操作简单方便，适合工业化。     

N-Boc-(S)-二羟甲基吗啉的合成研究

研究讨论了以D-甘露醇为原料,经过丙叉化反应,高碘酸钠氧化,通过引入苄胺使手性碳原子构型发生转变.接着进行氯乙酰化、醋酸脱丙叉以及碱性环境下关环反应.还原内酰胺生成(S)-N-苄基-2-羟甲基吗啉,Pd/C催化脱苄基,最后上叔丁氧羰基保护,制得标题化合物,总产率约35%.     

1,1-二(4-羟基苯基)环辛烷的合成

以环辛酮和苯酚为原料,β-巯基丙酸为助催化剂,通人干燥的氯化氢气体在常温常压下反应制得标题化合物,其结构经红外、核磁共振氢谱和质谱确认正确.研究表明:氯化氢气体催化效果明显好于其他酸催化剂,硫醇/酚类化合物是有效的助催化剂,加热对反应不利.最佳反应条件为:n(环辛酮)∶n(苯酚)∶n(β-巯基丙酸)=1∶5∶0.1,干燥氯化氢气氛,无溶剂条件下,室温常压反应5d,产率81.0％.     

2,2-二羟甲基丁酸合成工艺研究

以正丁醛、甲醛和双氧水为主要原料,经羟醛缩合、氧化反应制备2,2-二羟甲基丁酸,考察了缩合、氧化反应条件。结果表明,最佳缩合反应条件为:正丁醛∶甲醛∶双氧水=1∶2.4∶1.4(摩尔比),缩合反应温度35℃左右,缩合反应时间6 h;氧化反应条件为:温度80℃左右,反应时间6 h。反应液采用离子交换→真空浓缩→溶剂结晶→重结晶工艺处理,2,2-二羟甲基丁酸产品总收率大于40%。     

新型二醚类给电子体DMMF的合成研究及结构表征

以工业芴为原料,经甲醛羟甲基化反应合成了9,9-双(羟甲基)芴,再以NaH为催化剂,与CH3I发生烷基化反应得到了目标产物9,9-双(甲氧基甲基)芴(DMMF),产品收率可达80.0%以上。采用红外光谱和核磁共振谱等分析测试手段对产品进行了结构表征并逐一归属。实验结果表明,该方法是一种实用的制备DMMF的简便方法。     

Design and synthesis of 1,4-bis[4-(1,1-dicyanovinyl)styryl]-2,5-bis(alkoxy)benzenes as red organic electroluminescent PPV analogs

A series of 1,4-distyrylbenzene derivatives containing 1,1-dicyanovinyl moieties were designed as poly-p-phenylenevinylene analogs to obtain the red electroluminescence assisted by the computational results. Based on the subsequent synthesis and optical studies, the present work indicated that introduction of 1,1-dicyano group as electron receptor in PPV skeleton could shift the electroluminescence significantly to the red region. The present work has shown a successful strategy to tune the emission of PPV analogs based on the theoretical design and organic synthesis.     

Syntheses of new amino‐functionalized methacrylates and their use in free radical polymerizations

For use in emulsion and solution copolymerization a series of novel amino‐functional methacrylates has been synthesized, most of which have seldom, or never, been described in the literature before. In this investigation, the preparation of the hydrochloric and/or tosylate salt of the monomers aminoethyl, 3‐amino‐1‐propyl, 5‐amino‐1‐pentyl, 6‐amino‐1‐hexyl and 11‐amino‐1‐undecyl methacrylate will be described, along with the characterization of the parameters water solubility, pK_a and chemical stability. The homopolymers of these monomers have been prepared and characterized. Results show the occurrence of an acyl migration upon neutralization of the monomers aminoethyl‐ and 3‐amino‐1‐propyl methacrylate. This migration does not occur in the monomer 5‐amino‐1‐pentyl methacrylate, which makes it possible to synthesize the neutralized monomer although, after neutralization, a Michael addition occurs, resulting in a limited lifetime. Copolymerizations have been performed in emulsion. The monomer aminopentyl methacrylate especially proved to be suitable for emulsion copolymerizations when used under controlled conditions. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1401–1415, 2001     

Elektrochemische Carboxylierung von Cinnamoyl-1,1-bis(alkylthio)-ethylenen

Electrochemical Carboxylation of Cinnamoyl-1,1-bis(alkylthio)ethylenes Cinnamoyl-1,1-bis(alkylthio)ethylenes ( 1a–1h ) are reduced electrochemically in the presence of carbondioxide in aprotic media. The attack of CO₂ takes place either in 1- or 5-position of cinnamoyl-1, 1-bis(alkylthio)ethylenes ( 1a–1h ) depending on the nature of the aryl substituents. If CO₂ reacts in position 1 carbonic acids 3 are obtained, reaction of carbondioxide in 5- position leads to the acids 2 . The effects of different aryl substituents on the halfwave potentials and the preparative electrolyses have been investigated.