Synthesis and catalytic applications of Ru and Ir complexes containing N,O-chelating ligand
作者:Bilge Pakyapan、Serdar Batıkan Kavukcu、Zarife Sibel Şahin、Hayati Türkmen
DOI:10.1016/j.jorganchem.2020.121486
日期:2020.10
crystallography. The complexes (Ru1–5, Ir1–5) were applied to investigate the electronic and steric effect of ligand in their catalytic activities in transfer hydrogenation and alpha(α)-alkylation reaction of ketones with alcohols. The activities of iridium complexes (Ir1–5) were much more efficient than ruthenium complexes (Ru1–5). The highest activity for both reactions was observed for the complex (Ir2) with
Photoenzymatic Generation of Unstabilized Alkyl Radicals: An Asymmetric Reductive Cyclization
作者:Phillip D. Clayman、Todd K. Hyster
DOI:10.1021/jacs.0c07918
日期:2020.9.16
Flavin-dependent 'ene'-reductases (ERED) can generate stabilized alkyl radicals when irradiated with visible light, however, they are not known to form unstabilized radicals. Here, we report an enantioselective radical cyclization using alkyl iodides as precursors to unstabilized nucleophilic radicals. Evidence suggests this species is accessed by photoexcitation of a charge-transfer complex that forms between flavin
Cascade Michael Addition/Cycloketalization of Cyclic 1,3-Dicarbonyl Compounds: Important Role of the Tethered Alcohol of α,β-Unsaturated Carbonyl Compounds on Reaction Rate and Regioselectivity
Reactions of α,β-unsaturated aldehydes and cyclic 1,3-dicarbonylcompounds proceed primarily by cascade Knoevenagel condensation/six-π-electron electrocyclization (K6EC, formal [3 + 3] cycloaddition), while α,β-unsaturated ketones usually react with cyclic 1,3-dicarbonylcompounds in a 1,4-addition manner. This paper discloses our findings that under acidic conditions, α,β-unsaturated carbonyl compounds
Production of 1,6-hexanediol from tetrahydropyran-2-methanol by dehydration–hydration and hydrogenation
作者:Samuel P. Burt、Kevin J. Barnett、Daniel J. McClelland、Patrick Wolf、James A. Dumesic、George W. Huber、Ive Hermans
DOI:10.1039/c6gc03606f
日期:——
In this work we present an alternate method for the conversion of tetrahydropyran-2-methanol (THP2M), a cellulose-derived renewable building block, to 1,6-hexanediol (1,6-HDO).
PROCESS FOR PREPARING PLASTICS USING 1,6-HEXANEDIOL HAVING AN ALDEHYDE CONTENT OF LESS THAN 500 PPM
申请人:PINKOS Rolf
公开号:US20110124905A1
公开(公告)日:2011-05-26
The present invention relates to a process for preparing plastics using 1,6-hexanediol having an aldehyde content of less than 500 ppm, a process for preparing 1,6-hexanediol having an aldehyde content of less than 500 ppm and also 1,6-hexanediol having an aldehyde content of less than 500 ppm.