Taming of Singlet Oxygen: Towards Artificial Oxygen Carriers Based on 1,4‐Dialkylnaphthalenes
作者:Jin Li、Lei Wang、Jinrong Li、Yujie Shao、Ziang Liu、Guangzhe Li、Engin U. Akkaya
DOI:10.1002/chem.202200506
日期:2022.6.15
endoperoxides are known as convenient sources of singletoxygen (O2 , 1 Δg ), which is the major product of endoperoxide cycloreversion reaction. However, their potential as carriers of ground-state molecular oxygen (O2 , 3 Σg ) similar to artificial oxygen carriers remains largely unexplored. This is due to the extreme reactivity and cytotoxic effects of the released singletoxygen. We now report that a compound
PROCESS FOR PRODUCING HYDROXYALKYLTRIETHYLENEDIAMINE, AND CATALYST COMPOSITION FOR THE PRODUCTION OF POLYURETHANE RESIN USING IT
申请人:Tokumoto Katsumi
公开号:US20110077376A1
公开(公告)日:2011-03-31
To provide a process for producing a hydroxyalkyltriethylenediamine or hydroxytriethylenediamine simply and in a small number of steps without requiring multi-stage reaction steps; a novel catalyst composition whereby a polyurethane product can be obtained with good productivity and good moldability without bringing about odor problems or environmental problems; and a process for producing a polyurethane resin using the catalyst composition.
For example, a hydroxyalkyltriethylenediamine or hydroxytriethylenediamine is produced by subjecting a mono-substituted dihydroxyalkylpiperazine and/or a di-substituted hydroxyalkylpiperazine to an intramolecular dehydration condensation reaction in the presence of an acid catalyst.
Further, for example, a polyurethane resin is produced by using a catalyst composition which comprises a hydroxyalkyltriethylenediamine or hydroxytriethylenediamine (A), and an amine compound (B) having, in its molecule, one or more substituents selected from the group consisting of a hydroxy group, a primary amino group and a secondary amino group, or a tertiary amine compound (C) having a value of [blowing reaction rate constant/gelling reaction rate constant] of at least 0.5.
PROCESS FOR PRODUCING HYDROXYALKYLTRIETHYLENEDIAMINE COMPOUND, AND CATALYST COMPOSITION FOR THE PRODUCTION OF POLYURETHANE RESIN USING THE HYDROXYALKYLTRIETHYLENEDIAMINE COMPOUND