CAS: 3978-81-2; 4-(Tert-Butyl)Pyridine

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3-Carboxy-2-(Pyridin-1-Ium-1-yl)Propanoate置于ammonium Peroxydisulfate,硫酸,Silver Nitrate,1,8-二氮杂双环[5.4.0]十一碳-7-烯体系中,用 二氯甲烷,水,1,2-二氯乙烷 作为反应溶剂,化学反应 20.5H,反应生成 4-叔丁基吡啶
参考文献:C-4-烷基化吡啶的实用和区域选择性合成
标题:C-4-烷基化吡啶的实用和区域选择性合成
摘要:吡啶的直接位置选择性 C-4 烷基化一直是杂环化学中长期存在的挑战,特别是吡啶本身.历史上,这一问题已通过使用预功能化材料来解决,以避免过度烷基化和区域异构体的混合物.这项研究报告了一种简单的马来酸衍生的吡啶封闭基团的发明,该封闭基团能够精确控制 C-4 处的 Minisci 型脱羧烷基化,从而可以廉价地获得这些有价值的结构单元.该方法适用于各种不同的吡啶和羧酸烷基供体,操作简单且可扩展,并且适用于以快速且廉价的方式获取已知结构.最后,这项工作指出了在最早的可能阶段(天然吡啶)使用 Minisci 化学的一个有趣的战略出发点,而不是目前几乎完全采用 Minisci 化学作为后期功能化技术的教条.
DOI:10.1021/jacs.1C05278

专利信息

专利号:US-8569560-B2
优先权日:2006-10-13
标题 :Synthesis of terminal alkenes from internal alkenes via olefin metathesis
发明人：SCHRODI YANN; PEDERSON RICHARD L; KAIDO HIROKI; TUPY MICHAEL J
权利人:ELEVANCE RENEWABLE SCIENCES
摘要:This disclosure relates generally to olefin metathesis, and more particularly relates to the synthesis of terminal alkenes from internal alkenes using a cross-metathesis reaction catalyzed by an olefin metathesis catalyst. According to one aspect, for example, a method is provided for synthesizing a terminal olefin, the method comprising contacting, in the presence of a ruthenium alkylidene metathesis catalyst, an olefinic substrate comprised of at least one internal olefin with a cross metathesis partner comprised of an alpha olefinic reactant, under reaction conditions effective to allow cross-metathesis to occur, wherein the reaction conditions include a reaction temperature of at least 35° C. The methods, compositions, reactions and reaction systems herein disclosed have utility in the fields of catalysis, organic synthesis, and industrial chemistry.

专利号:US-9255117-B2
优先权日:2006-07-13
标题 :Synthesis of terminal alkenes from internal alkenes and ethylene via olefin metathesis
发明人：SCHRODI YANN
权利人:MATERIA INC
摘要:This invention relates generally to olefin metathesis, and more particularly relates to the synthesis of terminal alkenes from internal alkenes using a cross-metathesis reaction catalyzed by a selected olefin metathesis catalyst. In one embodiment of the invention, for example, a method is provided for synthesizing a terminal olefin, the method comprising contacting an olefinic substrate comprised of at least one internal olefin with ethylene, in the presence of a metathesis catalyst, wherein the catalyst is present in an amount that is less than about 1000 ppm relative to the olefinic substrate, and wherein the metathesis catalyst has the structure of formula (II) n nwherein the various substituents are as defined herein. The invention has utility, for example, in the fields of catalysis, organic synthesis, and industrial chemistry.

专利号:US-10266565-B2
优先权日:2011-04-12
标 题 :Peptide mimetic ligands of polo-like kinase 1 polo box domain and methods of use
发明人：BURKE JR TERRENCE R; LIU FA; LEE KYUNG S; PARK JUNG-EUN
权利人:BURKE JR TERRENCE R; LIU FA; LEE KYUNG S; PARK JUNG EUN; THE US SECRETARY DEPARTMENT OF HEALTH & HUMAN SERVICES
摘要:Novel compounds are provided that bind to polo-like kinases through the polo-box domain. In certain embodiments, the novel compounds are PEGylated peptides. The PEGylated peptides in accordance with the invention demonstrate high PBD-binding affinity. In certain embodiments, the PEGylated peptides have also achieved activities in whole cell systems. The invention also provides compounds that bind polo-like kinases through the polo-box domain and possess reduced anionic charge. Further provided are methods of design and/or synthesis of the PEGylated peptides and methods of use thereof. The invention provides methods of use of the compounds and methods of synthesis of the compounds.

专利号:US-8735586-B2
优先权日:2007-06-26
标 题 :Regioselective copper catalyzed synthesis of benzimidazoles and azabenzimidazoles
发明人：ALONSO JORGE; LINDENSCHMIDT ANDREAS; NAZARÉ MARC; URMANN MATTHIAS; HALLAND NIS; RKYEK OMAR
权利人:ALONSO JORGE; LINDENSCHMIDT ANDREAS; NAZARÉ MARC; URMANN MATTHIAS; HALLAND NIS; RKYEK OMAR; SANOFI SA
摘要:The present invention relates to a process for the regioselective synthesis of compounds of the formula I, n nwherein R0; R1; R2; R3; R4; R5; A1; A2; A3; A4, Q and J have the meanings indicated in the claims. The present invention provides a direct copper catalyzed regioselective process to a wide variety of unsymmetrical, multifunctional N-substituted benzimidazoles or azabenzimidazoles of formula I starting from 2-halo-nitroarenes and N-substituted amides.

专利号:US-9183993-B2
优先权日:2014-01-10
标 题 :One-pot synthesis of Nb2O5-doped TiO2 nanoparticles
发明人：FENG SHIEN-PING; SU HAIJUN; CHANG YA-HUEI; HUANG YU-TING; HAU NGA YU; ZHAI PENG
权利人:NANO & ADVANCED MATERIALS INST LTD
摘要:A one-pot synthesis of Nb 5+ -doped TiO 2 nanoparticles (NPs) with low cost and high efficiency for dye sensitized solar cells (DSSCs) is disclosed in the present invention. The Nb 5+ -doped TiO 2 NPs with Nb dopants of 0Ëœ5 mol % are prepared by directly mixing TiO 2 slurry with Nb 2 O 5 gel obtained by UV treatment of a mixture of NbCl 5 powder, ethanol and water in a certain ratio, following by heat treatment without using hydrothermal method. The as-prepared NPs exhibit well-crystallized pure anatase TiO 2 phase with uniform particle distribution. The incorporation of Nb 5+ leads to a stronger and broader light absorption in visible light range and a decrease of band gap with increasing Nb dopant content, which enhances the efficiencies of light-harvesting and electron injection and suppresses the charge recombination. The present method provides a simple and cost-effective mass-production route to synthesize n-type metallic ion doped TiO 2 nanoparticles as excellent photoanode materials.

专利号:EP-2173747-B1
优先权日:2007-06-26
标 题:A regioselective metal catalyzed synthesis of annelated benzimidazoles and azabenzimidazoles
发明人：ALONSO JORGE; LINDENSCHMIDT ANDREAS; NAZARE MARC; R KYEN OMAR; URMANN MATHIAS; HALLAND NIS
权利人:SANOFI SA
摘要:The present invention relates to a process for the regioselective synthesis of compounds of the formula I, wherein R1; R2; R3; R4; J1; J2; J3; J4 and G have the meanings indicated in the claims. The present invention provides a direct metal, e.g. palladium or copper, catalyzed, regioselective process to a wide variety of unsymmetrical, multifunctional N-substituted benzimidazoles or azabenzimidazoles of formula I starting from 2-halo-nitroarenes and N-substituted amides.