Catalysis Series最新文献

筛选
英文 中文
CHAPTER 19. Influence of Noncovalent Interactions in Catalytic Ring-opening Polymerization Processes 19章。催化开环聚合过程中非共价相互作用的影响
Catalysis Series Pub Date : 2019-03-04 DOI: 10.1039/9781788016490-00415
Marta E. G. Mosquera, M. Palenzuela, María Fernández-Millán
{"title":"CHAPTER 19. Influence of Noncovalent Interactions in Catalytic Ring-opening Polymerization Processes","authors":"Marta E. G. Mosquera, M. Palenzuela, María Fernández-Millán","doi":"10.1039/9781788016490-00415","DOIUrl":"https://doi.org/10.1039/9781788016490-00415","url":null,"abstract":"Interest in noncovalent interactions in ring-opening polymerization (ROP) processes has burgeoned in recent years. Although the presence of these interactions has been proposed in several ROP mechanisms, the field where the role of noncovalent interactions has been emphasized and used for the design of catalysts is the so-called H-bonding catalysts. Both acidic and basic/nucleophilic species can promote the ROP of cyclic monomers via an H-bonding mechanism, as supported by theoretical studies and experimental evidence. In these catalytic systems, the combination of an H-bonding donor (HBD) and an H-bonding acceptor (HBA) leads to a bifunctional catalytic system in which the HBD activates the monomer and the HBA the initiating/propagating alcohol by H-bonding interactions. In most cases, the polymerization takes place under mild conditions with a living character. Very good control of the polymerization is achieved and narrowly dispersed polymers of predictable molecular weights are obtained, although the molecular weights are low to moderate. This type of catalyst is also effective in copolymerization processes. Apart from H-bonding, other noncovalent interactions have hardly been explored for ROP. This is an exciting area that is only in its infancy, and the exploration of the influence of other noncovalent interactions and the search for more active systems while maintaining good polymerization control are still open challenges.","PeriodicalId":10054,"journal":{"name":"Catalysis Series","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89939475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CHAPTER 11. Noncovalent Interactions in the Nitroaldol (Henry) Reaction 第十一章。硝基醛(Henry)反应中的非共价相互作用
Catalysis Series Pub Date : 2019-03-04 DOI: 10.1039/9781788016490-00232
S. Hazra, A. Pombeiro
{"title":"CHAPTER 11. Noncovalent Interactions in the Nitroaldol (Henry) Reaction","authors":"S. Hazra, A. Pombeiro","doi":"10.1039/9781788016490-00232","DOIUrl":"https://doi.org/10.1039/9781788016490-00232","url":null,"abstract":"The Henry (nitroaldol) reaction provides a useful method for C–C bond formation between a nitroalkane and an aldehyde or a ketone to form a β-nitro alcohol. Noncovalent interactions can play important roles in this reaction, namely by orienting the reactant molecules, lowering the reaction barriers or even building suitable supramolecular catalysts. This chapter considers the influence of noncovalent interactions (mainly H-bonding) in the Henry reaction (excluding the aza-Henry reaction) and the product selectivity including diastereoselectivity (anti or syn) and enantioselectivity.","PeriodicalId":10054,"journal":{"name":"Catalysis Series","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83268018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信