Methyl, ethyl, n-propyl, and benzyl p-hydroxyphenyl ketones and 6-hydroxy-1-tetralone are shown under the condition of ethylene ketal formation to undergo alkyl-carbonyl C-C bondscission, but not with p-hydroxybenzoph...Methyl, ethyl, n-propyl, and benzyl p-hydroxyphenyl ketones and 6-hydroxy-1-tetralone are shown under the condition of ethylene ketal formation to undergo alkyl-carbonyl C-C bondscission, but not with p-hydroxybenzophenone, p-hydroxyisobutyrophenone, and 5-hydroxy-1-indanone. It is suggested that the scissiou is preceded by an aldol condensation.展开更多
Hydrogenation of methyl p-hydroxyphenylacetate has been used for the synthesis of p-hydroxyphenyl ethanol.The reaction was catalyzed by Cu_(i)Zr_(j)-x%(mass fraction)carbon nanotubes(CNTs)catalysts.Incorporation of a ...Hydrogenation of methyl p-hydroxyphenylacetate has been used for the synthesis of p-hydroxyphenyl ethanol.The reaction was catalyzed by Cu_(i)Zr_(j)-x%(mass fraction)carbon nanotubes(CNTs)catalysts.Incorporation of a minor amount of CNTs into Cu_(i)Zr_(j) oxide can visibly increase the catalytic activity for the synthesis of p-hydroxyphenyl ethanol.The yield of p-hydroxyphenyl ethanol reaches 94.2%over a co-precipitated catalyst of Cu_(3)Zr_(1) oxide with 11.0%CNTs.Its catalytic activity shows no obvious decrease after three cycles.This is much better than the CNT-free co-precipitated catalyst with a good yield of 81.1%,Cu_(3)Zr_(1)-0%CNTs.展开更多
以丙酸和硝基苯为混合溶剂,苯甲醛、对羟基苯甲醛和吡咯为原料合成了5-对羟基苯基-10,15,20-三苯基卟啉(HPTPP).然后以HPTPP和环氧氯丙烷为原料,在NaOH催化条件下合成了5-[4-(2,3-环氧丙氧基)苯基]-10,15,20-三苯基卟啉(EPPTPP).利用傅...以丙酸和硝基苯为混合溶剂,苯甲醛、对羟基苯甲醛和吡咯为原料合成了5-对羟基苯基-10,15,20-三苯基卟啉(HPTPP).然后以HPTPP和环氧氯丙烷为原料,在NaOH催化条件下合成了5-[4-(2,3-环氧丙氧基)苯基]-10,15,20-三苯基卟啉(EPPTPP).利用傅里叶变换红外光谱仪(FTIR)、核磁共振波谱仪(NMR)、紫外可见分光光度计(UV-Vis)和荧光分光光度计分别对HPTPP和EPPTPP的化学结构和光学性质进行了表征与测试.结果表明:FTIR谱图中,1 347cm-1和917cm-1处为EPPTPP卟啉环中C N键伸缩振动吸收峰和环氧化物环的(C—OC键)不对称伸缩振动吸收峰.EPPTPP的1 H NMR谱图中,在δ2.94～4.56内5个位移峰峰面积比为1∶1∶1∶1∶1,与EPPTPP中环氧基团的不同氢原子数比完全一致.UV-Vis谱图中,具有与卟啉结构相符合的吸收峰,表明成功合成了EPPTPP.通过荧光光谱分析了HPTPP和EPPTPP的荧光性质,并计算得到了二者的荧光量子产率分别为0.140和0.143.展开更多
N-(p-hydroxyphenyl)methacrylamide was successfully synthesized(yield 86%) by the reaction of methacryloyl chloride with p-aminophenol.The separating and purifying methods of the product was discussed,and the influenci...N-(p-hydroxyphenyl)methacrylamide was successfully synthesized(yield 86%) by the reaction of methacryloyl chloride with p-aminophenol.The separating and purifying methods of the product was discussed,and the influencing factors on the synthesis were simply explored.The aim product was characterized and verified by FT-IR,1H NMR,MS spectra and elemental analysis.展开更多
文摘Methyl, ethyl, n-propyl, and benzyl p-hydroxyphenyl ketones and 6-hydroxy-1-tetralone are shown under the condition of ethylene ketal formation to undergo alkyl-carbonyl C-C bondscission, but not with p-hydroxybenzophenone, p-hydroxyisobutyrophenone, and 5-hydroxy-1-indanone. It is suggested that the scissiou is preceded by an aldol condensation.
基金This work was supported by the National Natural Science Foundation of China(No.21773196).
文摘Hydrogenation of methyl p-hydroxyphenylacetate has been used for the synthesis of p-hydroxyphenyl ethanol.The reaction was catalyzed by Cu_(i)Zr_(j)-x%(mass fraction)carbon nanotubes(CNTs)catalysts.Incorporation of a minor amount of CNTs into Cu_(i)Zr_(j) oxide can visibly increase the catalytic activity for the synthesis of p-hydroxyphenyl ethanol.The yield of p-hydroxyphenyl ethanol reaches 94.2%over a co-precipitated catalyst of Cu_(3)Zr_(1) oxide with 11.0%CNTs.Its catalytic activity shows no obvious decrease after three cycles.This is much better than the CNT-free co-precipitated catalyst with a good yield of 81.1%,Cu_(3)Zr_(1)-0%CNTs.
文摘以丙酸和硝基苯为混合溶剂,苯甲醛、对羟基苯甲醛和吡咯为原料合成了5-对羟基苯基-10,15,20-三苯基卟啉(HPTPP).然后以HPTPP和环氧氯丙烷为原料,在NaOH催化条件下合成了5-[4-(2,3-环氧丙氧基)苯基]-10,15,20-三苯基卟啉(EPPTPP).利用傅里叶变换红外光谱仪(FTIR)、核磁共振波谱仪(NMR)、紫外可见分光光度计(UV-Vis)和荧光分光光度计分别对HPTPP和EPPTPP的化学结构和光学性质进行了表征与测试.结果表明:FTIR谱图中,1 347cm-1和917cm-1处为EPPTPP卟啉环中C N键伸缩振动吸收峰和环氧化物环的(C—OC键)不对称伸缩振动吸收峰.EPPTPP的1 H NMR谱图中,在δ2.94～4.56内5个位移峰峰面积比为1∶1∶1∶1∶1,与EPPTPP中环氧基团的不同氢原子数比完全一致.UV-Vis谱图中,具有与卟啉结构相符合的吸收峰,表明成功合成了EPPTPP.通过荧光光谱分析了HPTPP和EPPTPP的荧光性质,并计算得到了二者的荧光量子产率分别为0.140和0.143.
文摘N-(p-hydroxyphenyl)methacrylamide was successfully synthesized(yield 86%) by the reaction of methacryloyl chloride with p-aminophenol.The separating and purifying methods of the product was discussed,and the influencing factors on the synthesis were simply explored.The aim product was characterized and verified by FT-IR,1H NMR,MS spectra and elemental analysis.
