Intramolecular-catalyzed hydrolysis of sulfonamides. 10. Intramolecular nucleophilic catalysis by the neighboring hydroxyl group in acid- and base-catalyzed hydrolysis of aromatic sulfonamides and sultones. Mechanism of intramolecular nucleophilic substitution at sulfonyl sulfur
作者:Anna Szadkowska、Karolina Żukowska、Aleksandra E. Pazio、Krzysztof Woźniak、Renat Kadyrov、Karol Grela
DOI:10.1021/om101129b
日期:2011.3.14
The preparation and X-ray structure characterization of new olefin metathesis initiators containing sulfone- and sulfonamide-substituted benzylidene ligands are described. We observed that these catalysts exhibit Ru center dot center dot center dot O(SO)R interactions, forming six-membered chelates. Tuning the electronic and steric factors of the benzylidene part as well as selecting the proper NHC ligands can have a direct impact on catalyst activity and stability, leading to promising new catalysts.
WAGENAAR, ANNO;ENGBERTS, JAN B. F. N., J. ORG. CHEM., 53,(1988) N 4, 768-772
作者:WAGENAAR, ANNO、ENGBERTS, JAN B. F. N.
DOI:——
日期:——
US3980713A
申请人:——
公开号:US3980713A
公开(公告)日:1976-09-14
Intramolecular-catalyzed hydrolysis of sulfonamides. 10. Intramolecular nucleophilic catalysis by the neighboring hydroxyl group in acid- and base-catalyzed hydrolysis of aromatic sulfonamides and sultones. Mechanism of intramolecular nucleophilic substitution at sulfonyl sulfur