Silver Tetrafluoroborate-Catalyzed Oxa-Diels-Alder Reaction Between Electrically Neutral Dienes and Aldehydes
作者:Xiaodong Zou、Lizheng Yang、Xiangli Liu、Hao Sun、Hongjian Lu
DOI:10.1002/adsc.201500487
日期:2015.10.12
Chemoselective oxa-Diels–Alder reactionsbetween electrically neutral 1,3-dienes and various aldehydes were achieved using the commercially available silver tetrafluoroborate (AgBF4) as catalyst. This catalytic process has high functional group tolerance. Heteroatoms at the β-position of the aryl aldehydes can greatly promote the reactivity of the substrates even with heterocyclic aldehydes that were
AlCl3 catalyzed oxa-Diels-Alder reaction of aromatic aldehydes with simple dienes
作者:Wujun Jian、Bo Qian、Hongli Bao、Daliang Li
DOI:10.1016/j.tet.2016.10.049
日期:2017.7
A highly regioselective and diastereoselective oxa-Diels-Alder reaction catalyzed by AlCl3 has been developed. This reaction is efficient and characterized by good functional group compatibility, F, Cl, CN, NO2, OMe and thiophenyl groups are tolerated. A Lewis acid catalyzed concerted cycloaddition mechanism is proposed based on the results.
A New Approach to Non-Coordinating Anions: Lewis Acid Enhancement of Porphyrin Metal Centers in a Zwitterionic Metal–Organic Framework
作者:Jacob A. Johnson、Brenna M. Petersen、Attila Kormos、Elena Echeverría、Yu-Sheng Chen、Jian Zhang
DOI:10.1021/jacs.6b05626
日期:2016.8.17
cationic metal center. We demonstrate the enhanced Lewis acidity of Mn(III)- and Fe(III)-porphyrins in the zwitterionic MOFs in three representative electrocyclization reactions: [2 + 1] cycloisomerization of enynes, [3 + 2] cycloaddition of aziridines and alkenes, and [4 + 2] hetero-Diels-Alder cycloaddition of aldehydes with dienes. This work paves a new way to design functional MOFs for tunable chemical
Scandium(III) Perfluorooctanesulfonate [Sc(OPf)<sub>3</sub>] : A Novel Catalyst for the Hetero Diels–Alder Reaction of Aldehydes with Non-Activated Dienes
Scandium(III) perfluorooctanesulfonate [scandium(III) perflate, Sc(OPf)3] was prepared from either scandium(III) chloride or oxide and perfluorooctanesulfonic acid. The perflate thus obtained acts as a novel Lewis acid catalyst for the intermolecular hetero Diels–Alderreaction of aldehydes with non-activated dienes under mild conditions. The characteristic features of the catalyst include (i) low
[EN] CORROLE-BASED FRAMEWORKS AND METHODS OF USE THEREOF<br/>[FR] STRUCTURES À BASE DE CORROLES ET LEURS PROCÉDÉS D'UTILISATION
申请人:MA SHENGQIAN
公开号:WO2021035010A1
公开(公告)日:2021-02-25
Described herein are corrole-based frameworks and methods for making the same. The corrole-based frameworks have unique structural and physical properties, which lends them to be versatile in a number of different applications and uses such as in gas storage/separation, proton conduction, biomedicine, sensing, and catalysis. In one aspect, the corrole-based frameworks are organic frameworks. In other aspects, the corrole-based frameworks are metalo-rganic frameworks.