Construction of Esters through Sulfuryl Fluoride (SO2F2) Mediated Dehydrative Coupling of Carboxylic Acids with Alcohols at Room Temperature
作者:Shi-Meng Wang、Njud S. Alharbi、Hua-Li Qin
DOI:10.1055/s-0039-1690017
日期:2019.10
on gram scale. A facile method for the construction of esters through dehydrative coupling of carboxylic acids with alcohols is developed. The reactions are mediated by sulfuryl fluoride (SO2F2) at room temperature and proceed with high efficiency. The method has several advantages including broad substrate scope, mild conditions, excellent functional group compatibility and affords high yields, even
抽象的 开发了一种通过羧酸与醇类的脱水偶合来构建酯的简便方法。该反应在室温下由硫酰氟(SO 2 F 2)介导,并以高效率进行。该方法具有许多优点,包括广泛的底物范围,温和的条件,出色的官能团相容性,即使在克级上也能提供高收率。 开发了一种通过羧酸与醇类的脱水偶合来构建酯的简便方法。该反应在室温下由硫酰氟(SO 2 F 2)介导,并以高效率进行。该方法具有许多优点,包括广泛的底物范围,温和的条件,出色的官能团相容性,即使在克级上也能提供高收率。
Synthesis and NMR spectroscopic conformational analysis of benzoic acid esters of mono- and 1,4-dihydroxycyclohexane, 4-hydroxycyclohexanone and the -ene analogue – The more polar the molecule the more stable the axial conformer
作者:Erich Kleinpeter、Peter Werner、Torsten Linker
DOI:10.1016/j.tet.2017.04.029
日期:2017.7
para-Substituted benzoic acid esters of cyclohexanol, 1,4-dihydroxycyclohexane, 4-hydroxy-cyclohexanone and of the corresponding exo-methylene derivative were synthesized and the conformational equilibria of the cyclohexane skeleton studied by low temperature 1H and 13C NMR spectroscopy. The geometry optimized structures of the axial/equatorial chair conformers were computed at the DFT level of theory
合成了环己醇,1,4-二羟基环己烷,4-羟基-环己酮和相应的外亚甲基衍生物的对位取代的苯甲酸酯,并通过低温1 H和13 C NMR光谱研究了环己烷骨架的构象平衡。在理论的DFT级别上计算了轴向/赤道座椅贴合器的几何优化结构。分别对于轴向和赤道构象异构体仅获得酯基的一种优选构象。轴向含量构象子随6-元环部分极性的增加而增加;因此,此外,严格评估了sp 2杂交/ C(4)= O / C(4)= CH 2的极性对当前构象平衡的影响。可以首次研究这种化合物的另一种动态过程。
On the understanding of BF<sub>3</sub>·Et<sub>2</sub>O-promoted intra- and intermolecular amination and oxygenation of unfunctionalized olefins
作者:Chun-Hua Yang、Wen-Wen Fan、Gong-Qing Liu、Lili Duan、Lin Li、Yue-Ming Li
DOI:10.1039/c5ra10513g
日期:——
for both intra- and intermolecular amination and oxygenation of unfunctionalized olefins. In the presence of 3 equiv. of BF3·Et2O, intramolecular hydroamination of N-(pent-4-enyl)-p-toluenesulfonamides, N-(hex-5-enyl)-p-toluenesulfonamides, intermolecular hydroamination between sulfonamides and cyclohexene, norbornene or styrene, lactonization of pent-4-enoic acid or hex-5-enoic acid compounds and esterification
[EN] SOLUBILIZING AGENTS FOR FUNCTIONAL ACTIVE COMPOUNDS<br/>[FR] AGENTS SOLUBILISANTS POUR COMPOSÉS ACTIFS FONCTIONNELS
申请人:ISP INVESTMENTS INC
公开号:WO2016201260A1
公开(公告)日:2016-12-15
A photo protective topical composition, comprising: (i) at least one functional active; and (ii) at least one solubilizing compound having the structure of Formula (I): wherein R is C5-C10 cycloalkyl or linear or branched alkylcycloalkyl, wherein the ring size is C5-C7; R1, R2, and R3 are each independently selected from the group consisting of H, and linear or branched C1-C4 alkyl, provided that at least two of R1, R2, R3 are H; wherein the solubilizing compound is present in an amount effective to solubilize said functional active. Also disclosed is a method for treating skin, lips, nails, hair, ears, eyelashes, eyebrows and/or scalp with an effective amount of composition.
Disclosed is a selective ester production process of an alcoholic hydroxyl group, which proceeds under chemically mild conditions, while having adequate environmental suitability, operability and economical efficiency. Specifically disclosed is a process for producing an ester compound, which is characterized in that an alcohol and a carboxylic acid ester compound are reacted in the presence of a compound containing zinc element, thereby selectively acylating a hydroxyl group of the alcohol.