ruthenium catalyst was prepared starting with readily accessible starting materials. Under inert gas atmosphere and in air the catalyst showed high activity for the direct synthesis of esters from primary alcohols and of amides from primary alcohols and amines. Di-, tri-, and oligo-amides were obtained by using specific starting materials.
d-Glucose has been identified as an efficient C1 synthon in the synthesis of benzimidazoles from o-phenylenediamines via an oxidative cyclization strategy. Isotopic studies with 13C6-d-glucose and D2O unambiguously confirmed the source of methine. The notable features of this method include the following: broad functional group tolerance, a biorenewable methine source, excellent reaction yields, a
d-葡萄糖已被确定为通过氧化环化策略由邻苯二胺合成苯并咪唑的有效C1合成子。用13 C 6 - d-葡萄糖和D 2 O进行的同位素研究明确证实了次甲基的来源。该方法的显着特征包括:宽泛的官能团耐受性,可生物再生的次甲基来源,优异的反应收率,较短的反应时间,水作为环境友好的溶剂以及以克为单位的维生素B 12组分的合成。
Amidate compound, catalyst for polyurethane production, and method for producing polyurethane resin
申请人:KOEI CHEMICAL COMPANY, LIMITED
公开号:US10689478B2
公开(公告)日:2020-06-23
Provided is an amidate compound represented by the formula (1):
wherein A is a substituted or unsubstituted hydrocarbon group, n is an integer of 1 or more, and D is a nitrogen-containing organic group represented by the formula (2):
wherein R1, R2, and R3 are the same or different, and are each a hydrocarbon group that may contain a heteroatom; some or all of R1, R2, and R3 may be bonded together to form a ring structure; X is a nitrogen atom, an oxygen atom, or a sulfur atom; and a is 0 or 1, wherein a is 1 when X is a nitrogen atom, and a is 0 when X is an oxygen atom or a sulfur atom.
A green and sustainable phosphine-free NHC-ruthenium catalyst for selective oxidation of alcohols to carboxylic acids in water
作者:Jagadeesh Malineni、Helmut Keul、Martin Möller
DOI:10.1039/c5dt01358e
日期:——
present a new catalytic system for the selective dehydrogenative oxidation of primary alcohols to carboxylic acids using a phosphine-free NHC-ruthenium catalyst in water under mild reaction conditions. With this catalytic system, a variety of primary alcohols have been converted to carboxylic acids respectively, in aqueous media, without using any additional oxidant; the only side product in this reaction
Tris-imidazolium and benzimidazolium ionic liquids: a new class of biodegradable surfactants
作者:Nassir N. Al-Mohammed、Rusnah Syahila Duali Hussen、Yatimah Alias、Zanariah Abdullah
DOI:10.1039/c4ra14027c
日期:——
301D, the incorporation of alkyl or phenyl side chains with ester groups in the same molecule significantly improved the biodegradation compared to sodium n-dodecyl sulphate (SDS) as a reference. The aliphatic alkyl side chain, i.e., butyl, hexyl, octyl, decyl and dodecyl, in both imidazolium and benzimidazolium ionic liquids have marked increasing biodegradation and phase behaviour results compared to
基于咪唑鎓和苯并咪唑鎓,简单地从容易获得的起始原料以高收率合成了两个系列的含有酯基的新型三阳离子离子液体表面活性剂。研究了tris-咪唑鎓和tris-苯并咪唑鎓离子液体的生物降解性和表面活性剂性能。一些化合物在纯形式(即无溶剂)和极性或非极性溶剂的存在下表现出组装行为。这些表面活性剂有效地降低了28-31 mN m -1范围内的水的表面张力。通过使用“密闭瓶测试” OECD 301D,与钠n相比,在同一分子中烷基或苯基侧链与酯基的结合显着改善了生物降解。硫酸十二烷基酯(SDS)作为参考。与芳族侧链相比,咪唑鎓和苯并咪唑鎓离子液体中的脂肪族烷基侧链,即丁基,己基,辛基,癸基和十二烷基具有显着增加的生物降解性和相行为结果。