Environmentally Sustainable and Chemo-selectively Favorable Synthesis of Substituted 2<i>H</i>-Pyran-2-ones in Water under MWI
作者:Liang-Yan Cui、Xin Wang、Yan He、Xue-Sen Fan
DOI:10.1002/jccs.201300013
日期:2014.2
this paper, a novel synthesis of diversely substituted 2H‐pyran‐2‐ones via the tandem reaction of 3‐hydroxyhexa‐4,5‐allenic esters in waterunder the promotion of MWI has been developed. Compared with those reactions carried out in organic solvents, water mediated synthesis of poly‐substituted 2H‐pyran‐2‐ones is not only environmentallysustainable, but also chemo‐selectively favorable.
Tandem reaction of 3-hydroxyhexa-4,5-allenic esters: a novel access to diversely substituted 2H-pyran-2-ones and indenes
作者:Haiyun Xu、Xinying Zhang、Yan He、Shenghai Guo、Xuesen Fan
DOI:10.1039/c2cc30247k
日期:——
A highly efficient synthesis of diversely substituted 2H-pyran-2-ones and indenes through Brønsted acid promoted tandem reaction of the readily obtainable 3-hydroxyhexa-4,5-allenic esters under extremely mild conditions has been developed.
Lohaus; Dittmar, Arzneimittel-Forschung/Drug Research, 1981, vol. 31, # 8 a, p. 1311 - 1316
作者:Lohaus、Dittmar
DOI:——
日期:——
Crystallographic Investigation and Selective Inhibition of Mutant Isocitrate Dehydrogenase
作者:Baisong Zheng、Yuan Yao、Zhen Liu、Lisheng Deng、Justin L. Anglin、Hong Jiang、B. V. Venkataram Prasad、Yongcheng Song
DOI:10.1021/ml400036z
日期:2013.6.13
Mutations in isocitrate dehydrogenase (IDH), a key enzyme in the tricarboxylic acid cycle, have recently been found in similar to 75% glioma and similar to 20% acute myeloid leukemia. Different from the wild-type enzyme, mutant IDH1 catalyzes the reduction of alpha-ketoglutaric acid to D-2-hydroxyglutaric acid. Strong evidence has shown mutant IDH1 represents a novel target for this type of cancer. We found two 1-hydroxypyridin-2-one compounds that are potent inhibitors of R132H and R132C mutants with K-i values as low as 120 nM. These compounds exhibit >60-fold selectivity against wild-type IDH1 and can inhibit the production of D-2-hydroxyglutaric acid in IDH1 mutated cells, representing novel chemical Probes for cancer biology studies. We also report the first inhibitor-bound crystal structures of IDH1(R132H), showing these inhibitors have H-bond, electrostatic, and hydrophobic interactions with the mutant enzyme. Comparison with the substrate-bound IDH1 structures revealed the structural basis for the high enzyme selectivity of these compounds.
Development of Novel <i>N</i>-hydroxypyridone Derivatives as Potential Anti-Ischemic Stroke Agents
Our previous study had identified ciclopirox (CPX) as a promising lead compound for treatment of ischemic stroke. To find better neuroprotective agents, a series of N-hydroxypyridone derivatives based on CPX were designed, synthesized, and evaluated in this study. Among these derivatives, compound 11 exhibits significant neuroprotection against oxygen glucose deprivation and oxidative stress -induced injuries in neuronal cells. Moreover, compound 11 possesses good blood-brain barrier permeability and superior antioxidant capability. In addition, a complex of compound 11 with olamine-11.01a possesses good water solubility, negligible hERG inhibition, and superior metabolic stability. The in vivo experiment demonstrates that 11.01a significantly reduces brain infarction and alleviates neurological deficits in middle cerebral artery occlusion rats. Hence, compound 11.01a is identified in our research as a prospective prototype in the innovation of stroke treatment.