produce ketones. Even in the presence of substrates and reagents with high steric hindrance, the organometallic compounds prepared from dry cerium(III) chloride and organomagnesium or organolithium compounds at -78 degrees C add cleanly to morpholine amides. The low cost of starting materials makes this new scheme of synthesis very interesting for the preparation of biologically important pheromones.
A series of N-substituted morpholines 2–20 was synthesised by reacting various acid chlorides and alkyl halides with morpholine (1). All of the synthesised compounds 2–20 were screened for their leishmanicidal effects using amphotericin B (IC50 = 0.24 µg L−1) and pentamidine (IC50 = 2.56 µg mL−1) as standards and a structure–activityrelationship (SAR) study was established. The compounds 2 (IC50 =
Nickel-catalyzed cross-coupling of unactivated alkyl halides and tosylate carrying a functional group with alkyl and phenyl Grignard reagents
作者:Surya Prakash Singh、Jun Terao、Nobuaki Kambe
DOI:10.1016/j.tetlet.2009.07.094
日期:2009.10
primary and secondaryalkylGrignardreagents undergo cross-coupling with alkyl bromides, iodide, and tosylate carrying a functional group such as amide, ester, and ketone at 0 °C in THF. The present procedure provides a simple, convenient, and practical method for construction of carbon chains in the presence of various functional groups. PhMgBr also gave the corresponding coupling product in a moderate
作者:Cyril Henry、David Bolien、Bogdan Ibanescu、Sally Bloodworth、David C. Harrowven、Xunli Zhang、Andy Craven、Helen F. Sneddon、Richard J. Whitby
DOI:10.1002/ejoc.201403603
日期:2015.3
Ketenes were generated by the thermolysis of alkoxyalkynes under flow conditions, and then trapped with amines and alcohols to cleanly give amides and esters. For a 10 min reaction time, temperatures of 180, 160, and 140 degrees C were required for >95 % conversion of EtO, iPrO, and tBuO alkoxyalkynes, respectively. Variation of the temperature and flow rate with inline monitoring of the output by
酮基是通过在流动条件下热解烷氧基炔烃而生成的,然后用胺和醇截留以干净地得到酰胺和酯。在10分钟的反应时间内,分别需要180、160和140摄氏度的温度才能分别使EtO,iPrO和tBuO烷氧基炔烃的转化率> 95%。温度和流速的变化以及通过红外光谱对输出的在线监测使得可以容易地估计用于1-乙氧基-1-辛炔转化的动力学参数(E a = 105.4 kJ / mol)。用醇捕集原位生成的乙烯酮以得到酯,需要添加叔胺催化剂以防止将乙烯酮竞争性地[2 + 2]加成至烷氧基炔烃前体。
FILM FORMING COATING COMPOSITIONS CONTAINING CARBOXAMIDE COALESCING SOLVENTS AND METHODS OF USE
申请人:Luebke Gary
公开号:US20130143986A1
公开(公告)日:2013-06-06
A film may be formed from film forming compositions which comprise at least one carboxamide based coalescing solvent. These coalescing solvents impart equivalent or improved wet-scrub resistance, block resistance, gloss, dirt pick-up resistance and leveling characteristics to the films on a substrate, without contributing to total VOC levels, when replacing conventional coalescing solvents. The present invention also includes a method for forming a film comprising applying a film forming composition comprising polyunsaturated reactive carboxamides to a substrate and curing the film under ambient conditions. The coalescing carboxamide solvents are suitable for paint, latex based caulk, adhesives and floor care applications.