Epoxidation of olefins with cationic (salen)manganese(III) complexes. The modulation of catalytic activity by substituents
作者:K. Srinivasan、P. Michaud、Jay K. Kochi
DOI:10.1021/ja00269a029
日期:1986.4
Augmentation d'activite avec des substituants attracteurs d'electrons (dichloro ou dinitro)
增强 d'activite avec des substituants 吸引力 d'electrons (dichloro ou dinitro)
Investigation of the substituent effects on the oxidation of styrene derivatives by silica‐supported heterogeneous oxidovanadium(V) coordination compound
作者:Neda Heydari、Rahman Bikas、Maryam Shaterian、Marta S. Krawczyk、Tadeusz Lis
DOI:10.1002/aoc.6976
日期:2023.2
and characterized by various analytical methods. The results indicated its high stability. The effects of parameters such as temperature, the ratio of reagents, and nature of solvent on selectivity and activity of Si-VO2L were investigated. The results indicated that both of the steric and electronic effects of the substituents on the phenyl ring of styrene can affect the selectivity and activity of
钒配位化合物 [VO 2 L]·(CH 3 OH) ( 1a和1b ) 由三齿腙配体 [HL=( E )-4-氨基-N'-(1-(吡啶)的反应制备-2-ylethylidene)benzohydrazide]分别与NH 4 VO 3和V 2 O 5。这些化合物通过各种分析方法表征,单晶X射线分析确定了1a和1b的结构,表明它们具有相同的组成,但在不同的晶胞中结晶,可以被认为是多晶型物。二氧化硅负载的催化剂(Si-VO2 L ) 是通过使用丙酰氯功能化硅胶将1固定在二氧化硅表面而获得的。Si-VO 2 L通过热重分析(TGA)、能量色散X射线光谱(EDX)、傅立叶变换红外(FT-IR)光谱、漫反射光谱(DRS)、X射线光电子能谱表征(XPS)、扫描电子显微镜(SEM) 和X 射线衍射分析(XRD) 并用作苯乙烯衍生物氧化的非均相催化剂,H 2 O 2水溶液用作绿色氧化剂。Si-VO 2 L回
ISHIKAWA, FUMIYOSHI;KITAGAWA, MASAYUKI;SATOH, YOSHINARI;SAEGUSA, JUNJI;TA+, CHEM. AND PHARM. BULL., 1985, 33, N 7, 2838-2848
A series of (substituted phenyl)-2, 3, 5, 6-tetrahydro-1H-imidazo [1, 2-a] imidazoles (10) and their 2- or 3-oxo derivatives (20 and 21) were unambiguously prepared. These compounds were evaluated for antihypertensive and diuretic activities. Antihypertensive activity in spontaneously hypertensive rats (SHR) was observed in the series of compounds 10, whereas compounds 20 and 21 did not possess the activity. Diuretic effects in SHR and normotensive rats were observed in both the series of 10 and the 2- or 3-oxo derivatives (20 and 21). The relationship between the activities and the substituents on the phenyl ring is discussed.