The acid-catalysed reaction of methyl 9,10-epoxystearate ring opening using syntheticsaponite acid clay as catalyst, has been studied for the first time. In the presence of methanol, 90% of the epoxide substrate is converted after 5 min and the main reaction product is the vicinal hydroxyether, methyl methoxyhydroxystearate, with 84% of selectivity. In the absence of alcohol the ring opening reaction
9,10-环氧硬脂酸甲酯的开环酸合成皂石酸粘土的酸催化反应 催化剂,是第一次研究。在......的存在下甲醇,占90% 环氧化物 5分钟后转化底物,主要反应产物为邻位 羟基醚, 甲氧基羟基硬脂酸甲酯,具有84%的选择性。在缺少...之下酒精开环反应进行得较慢,导致以9-和10-氧代硬脂酸甲酯为主要产物的混合物,并在1小时后转化为66%的9,10-环氧硬脂酸酯。酸性皂石的性能,对环境无害催化剂,远高于强者 矿物这种反应中广泛使用的酸,例如H 2 SO 4。
Synthesis of Biobased Polyurethane from Oleic and Ricinoleic Acids as the Renewable Resources via the AB-Type Self-Condensation Approach
作者:Dnyaneshwar V. Palaskar、Aurélie Boyer、Eric Cloutet、Carine Alfos、Henri Cramail
DOI:10.1021/bm100233v
日期:2010.5.10
Polyurethane (PU) from methyl oleate (derived from sunflower oil) and ricinoleic acid (derived from castor oil) was synthesized using the AB-type self-polycondensation approach for the first time. In the present work, three novel AB-type monomers, namely, a mixture of 10-hydroxy-9-methoxyoctadecanoyl azide/9-hydroxy-10-methoxyoctadecanoyl azide (HMODAz), 12-hydroxy-9-cis-octadecenoyl azide (HODEAz)
Chemical Characterization and Physical Properties of Solvents Derived from Epoxidized Methyl Soyate
作者:Sean J. Riley、John G. Verkade、Robert J. Angelici
DOI:10.1007/s11746-015-2607-6
日期:2015.4
reactions of methyl linoleate (18:2) with MeOH. All of the solvents were characterized by high boiling points and low vapor pressures. Their viscosities were higher than that of methylsoyate. Especially notable were their very high Kauri‐butanol values, which ranged from 280 to 852, all of which are much higher than that (57) of methylsoyate. Such high KB values indicate that these solvents have very
An innovative and eco-friendly one-pot synthesis of bio-based polyurethanes is proposed via the epoxy-ring opening of epoxidized soybean oil (ESO) with methanol, followed by the reaction of methoxy bio-polyols intermediates with 2,6-tolyl-diisocyanate (TDI). Both synthetic steps, methanolysis and polyurethane linkage formation, are promoted by a unique catalyst, molybdenum(VI) dichloride dioxide (MoCl2O2), which makes this procedure an efficient, cost-effective, and environmentally safer method amenable to industrial scale-up.
POLYURETHANE SYNTHESIS BY MEANS OF SELF-CONDENSATION
申请人:Cramail Henri
公开号:US20120264901A1
公开(公告)日:2012-10-18
The present invention relates to a compound with the following formula (I) where: R
1
is particularly a straight or branched alkyl group, a is a single or double bond; R
2
is particularly a hydrogen atom; R
3
and R
5
are a hydrogen atom when a is a single bond, and absent when a is a double bond; R
4
is a hydrogen atom or an OR
b
group, where R
b
is a hydrogen atom or an alkyl group including 1 to 12 atoms of carbon, and A
1
is a divalent alkylene radical.