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An unexpected synthesis of an α,β,γ,δ-unsaturated ketone due to an abnormal opening of benzylidene acetal by bromide anion

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Chinese Journal of Chemistry 2000年第2期18卷 212-219页

作者：魏常青赵刚丁渝 Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

An unexpected synthesis of an α, β, γ, δ-unsaturated ketone, which embodies a new type of oxy-carbon cyclic structure, was achieved, while we tried to construct the taxane CB-ring system. Also, a series of abnormal reaction phenomens was found to be related to the formation and reaction of seven membered cyclic benzylidene acetal.

关键词： synthesis unsaturated ketone seven membered cyclic benzylidene acetal

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Reaction Kinetics and Secondary Organic Aerosol Composition Analysis of 2-Cyclohexen-1-one with NO_(3) Radicals

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Chemical Research in Chinese Universities 2024年第4期40卷 730-736页

作者： HU Lin TONG Shengrui XU Yanyong ZHANG Hailiang YU Shanshan CHEN Meifang GE Maofa Structural Chemistry of Unstable and Stable Species Chinese Academy of Sciences Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190P.R.China College of Ecology and Environment Xinjiang UniversityUrumqi830017P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China

unsaturated ketones are typical oxygenated volatile organic compounds(OVOCs)with high reactivity,and are important precursors in air *** sources of OVOCs are complex and include direct emissions and secondary oxidation formation of VOCs in the atmosphere.2-Cyclohexen-1-one is a widespread substance,and is derived from the industrial catalytic oxidation of *** this paper,we investigated the rate constants of the chemical reactions of 2-cyclohexen-1-one with NO_(3) radicals,which is(7.25±0.29)×10^(-15) cm^(3)·molecule^(-1)·s^(-1) at 298 K and under 1 atm(1 atm=101325Pa).It supplemented the kinetics of NO_(3) radicals database,and revealed its effects in the nighttime *** addition,the reaction products of 2-cyclohexen-1-one with NO_(3) radicals were detected by Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS),which revealed a series of nitrate esters in the composition of the secondary organic aerosol(SOA),which may reduce atmospheric ***,the possible pathways for the generation of the products were developed.

关键词： Kinetics unsaturated ketone Nitrate radical Secondary organic aerosol

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