Hydration Behavior of Polylactam Clathrate Hydrate Inhibitors and Their Small-Molecule Model Compounds
作者:Andrea Perrin、Melissa J. Goodwin、Osama M. Musa、David J. Berry、Philip Corner、Katharina Edkins、Dmitry S. Yufit、Jonathan W. Steed
DOI:10.1021/acs.cgd.7b00221
日期:2017.6.7
compounds have been investigated by X-raycrystallography. The work reveals insight into the very low crystallinity and high hygroscopicity of these materials which is linked to their performance as KHIs. Analysis of water binding in sour gas systems, containing H2S and CO2, reveals no effect on the water affinity of the lactams, suggesting that sour gas components do not inhibit KHI performance, but rather
为了确定对其KHI性能的机理了解,已研究了一系列基于内酰胺的动力学笼形水合物水合物抑制剂(KHIs)的溶液水合行为。在一系列单和双(内酰胺)模型化合物之间比较了IR和1 H NMR光谱滴定数据,并通过动态蒸气吸附研究了固相水合行为。通过X射线晶体学研究了几种模型化合物的结构。这项工作揭示了对这些材料的极低结晶度和高吸湿性的洞察力,这与它们作为KHI的性能有关。分析含H 2 S和CO 2的酸性气体系统中的水结合,对内酰胺的水亲和力没有影响,表明酸性气体组分不会抑制KHI性能,而是促进包合物水合物的形成。
Iron-Catalyzed Anti-Markovnikov Hydroamination and Hydroamidation of Allylic Alcohols
作者:Wei Ma、Xiaohui Zhang、Juan Fan、Yuxuan Liu、Weijun Tang、Dong Xue、Chaoqun Li、Jianliang Xiao、Chao Wang
DOI:10.1021/jacs.9b05221
日期:2019.8.28
nonpolar solvent, features exclusive anti-Markovnikov selectivity, broad substrate scope (>70 examples), and good functional group tolerance. The reaction could be performed at gram scale and applied to the synthesis of drug molecules and heterocyclic compounds. When chiral substrates are used, the stereochemistry and enantiomeric excess are retained. Further application of the chemistry is seen in the
Remodeling and Enhancing Schmidt Reaction Pathways in Hexafluoroisopropanol
作者:Hashim F. Motiwala、Manwika Charaschanya、Victor W. Day、Jeffrey Aubé
DOI:10.1021/acs.joc.5b02764
日期:2016.2.19
The effect of carrying out two variations of the Schmidt reaction with ketone electrophiles in hexafluoroisopropanol (HFIP) solvent has been studied. When TMSN3 is reacted with ketones in the presence of triflic acid (TfOH) promoter, tetrazoles are obtained as the major products. This observation is in contrast to established methods, which usually lead to amides or lactams arising from formal NH insertion
Block copolymers comprising repeating units derived from monomers comprising lactam and acryloyl moieties and hydrophobic monomers, compositions, and applications thereof
申请人:ISP INVESTMENTS LLC
公开号:US10905636B2
公开(公告)日:2021-02-02
The invention provides block copolymers comprising at least one block A comprising repeating units derived from monomers comprising lactam and acryloyl moieties and at least one block B comprising repeating units derived from hydrophobic monomers. The invention further provides compositions comprising the block copolymers and applications thereof in various industrial areas including personal care. The invention furthermore provides compositions comprising colloidal particles of the block copolymers. The variables x, y, R8 and R9 are described herein.
本发明提供了嵌段共聚物,其中至少一个嵌段 A 包含由包含内酰胺和丙烯酰基的单体衍生的重复单元,至少一个嵌段 B 包含由疏水单体衍生的重复单元。本发明进一步提供了包含嵌段共聚物的组合物及其在包括个人护理在内的各种工业领域中的应用。本发明还提供了包含嵌段共聚物胶体颗粒的组合物。本文对变量 x、y、R8 和 R9 进行了描述。
Efficient Nitrogen Ring-Expansion Process Facilitated by in Situ Hemiketal Formation. An Asymmetric Schmidt Reaction
作者:Vijaya Gracias、Gregory L. Milligan、Jeffrey Aube