92207-34-6Relevant academic research and scientific papers
Visible-Light-Mediated Rose Bengal-Catalyzed α-Hydroxymethylation of Ketones with Methanol
Yang, Jingya,Xie, Dongtai,Zhou, Hongyan,Chen, Shuwen,Duan, Jiaokui,Huo, Congde,Li, Zheng
supporting information, p. 3471 - 3476 (2018/09/12)
A visible-light-mediated α-hydroxymethylation of ketones using methanol as the hydroxymethylating reagent has been developed. Using 1 mol% rose bengal as the photosensitizer and air as the green oxidant, the reactions proceeded smoothly at room temperature. Experimental studies indicate the reaction proceeded via a radical pathway. (Figure presented.).
Inotropic, vasodilator and low Km, cAMP-selective, cGMP-inhibited phosphodiesterase (PDE III) inhibitory activities of 4a-methyl-4,4a-dihydro-5H-indenopyridazin-3(2H)-ones and 4a-methyl-4,4a,5,6-tetrahydrobenzocinnolin-3(2H)-ones
Bakewell, S J,Coates, W J,Comer, M B,Reeves, M L,Warrington, B H
, p. 765 - 774 (2007/10/02)
Novel 7-substituted-4,4a-dihydro-4a-methyl-5H-indenopyridazin-3-ones and 8-substituted-4a-methyl-benzocinnolin-3-ones have been synthesized and their PDE III inhibitory, inotropic and vasodilator potencies compared with those of their normethyl analogues and their bicyclic 4,5-dihydro-6-phenylpyridazinone analogues.The structure-activity relationships of the tricyclic pyridazinones differ from those of bicyclic pyridazinones mainly in respect of the effect of introducing the methyl group into the pyridazinone ring.Whilst in the4,5-dihydro-6-phenylpyridazin-3(2H)-ones, introduction of a 5-methyl group has been widely reported to lead to compounds of significantly greater potency, the novel tricyclic 4a-methylpyridazinones showed similar levels of inotropic, vasodilator and PDE III inhibitory potency to their normethyl analogues.Possible reasons for this difference in behaviour are discussed.
