A facile and efficient reaction of α,β-unsaturated ketones and 3-amino-1-phenyl-1H-pyrazol-5(4H)-one in aqueous and acetonitrile medium
作者:Shuangshuang Xu、Zhansheng Wang、Xiuling Li、Liangce Rong、Shu-Jiang Tu
DOI:10.1016/j.tet.2016.07.073
日期:2016.9
A facile and efficient synthesis of pyrazolo[3,4-b]pyridines, indeno[1,2-b]pyrazolo[4,3-e]pyridine and benzo[h]pyrazolo[3,4-b]quinoline derivatives from the reaction of α,β-unsaturated ketone and 3-amino-1-phenyl-1H-pyrazol-5(4H)-one under mild conditions was reported. This reaction could be operated in aqueous and acetonitrile medium. The other advantages of this reaction were simple operation, mild
一种高效合成吡唑并[3,4- b ]吡啶,茚并[1,2- b ]吡唑并[4,3- e ]吡啶和苯并[ h ]吡唑并[3,4- b ]喹啉衍生物。报道了α,β-不饱和酮与3-氨基-1-苯基-1 H-吡唑-5(4 H)-one在温和条件下的反应。该反应可以在含水和乙腈介质中进行。该反应的其他优点是操作简单,反应条件温和,产率高和底物范围广。此外,3-amino-1-phenyl-1 H -pyrazol-5(4 H-一是用于合成这些杂环化合物的有效试剂。从实验事实来看,他的催化剂p -TSA·H 2 O和水都在该合成中起关键作用。
Enantioselective phospha-Michael reaction of diethyl phosphonate with exocyclic α,β-unsaturated benzocyclic ketones catalyzed by a dinuclear zinc−AzePhenol catalyst
作者:Na Shao、Yong-Yang Luo、Hui-Jie Lu、Yuan-Zhao Hua、Min-Can Wang
DOI:10.1016/j.tet.2018.03.016
日期:2018.4
The dinuclear zinc complexes as high performance catalysts were used to catalyze phospha-Michael reaction of exocyclic α,β-unsaturated benzocyclic ketones under mild conditions, and the desired products possessing 1-indanones or 1-tetralones skeleton were obtained with excellent enantioselectivities of up to 99%/99% ee and yields of up to 99%. The absolute stereochemistry of the major products catalyzed
Sequential 1,4‐/1,2‐Addition of Lithium(trimethylsilyl)diazomethane onto Cyclic Enones to Induce C−C Fragmentation and N−Li Insertion
作者:Matthew J. O'Connor、Chunrui Sun、Xinyu Guan、Venkata R. Sabbasani、Daesung Lee
DOI:10.1002/anie.201510152
日期:2016.2.5
α,β‐Unsaturated ketones generally undergo addition reactions with nucleophiles with a preference for either 1,2‐ or 1,4‐addition, but rarely both. However, the right combination of reagents allows for consecutive 1,4‐ and 1,2‐additions to occur: Cyclic α,β‐unsaturated ketones undergo double additions with lithium(trimethylsilyl)diazomethane, effectively generating various molecular frameworks with
Formal Aminocyanation of α,β-Unsaturated Cyclic Enones for the Efficient Synthesis of α-Amino Ketones
作者:Chunrui Sun、Matthew J. O'Connor、Daesung Lee、Donald J. Wink、Robert D. Milligan
DOI:10.1002/anie.201309435
日期:2014.3.17
occurs through the formation of pyrazolines by means of a formal dipolar cycloaddition of cyclic α,β‐unsaturated ketones with lithium trimethylsilyldiazomethane followed by novel protonolytic NN bond cleavage under mild conditions. This two‐step process provides a diverse array of structurally complex free and mono‐alkylated α‐amino ketones in excellent yields.
In Vivo Structure-Activity Relationship Studies Support Allosteric Targeting of a Dual Specificity Phosphatase
作者:Vasiliy N. Korotchenko、Manush Saydmohammed、Laura L. Vollmer、Ahmet Bakan、Kyle Sheetz、Karl T. Debiec、Kristina A. Greene、Christine S. Agliori、Ivet Bahar、Billy W. Day、Andreas Vogt、Michael Tsang
DOI:10.1002/cbic.201402000
日期:2014.7.7
Probing allosteric inhibition of DUSP6: We present an in vivostructure–activityrelationship (SAR) approach using transgenic zebrafish to identify analogues of (E)‐2‐benzylidene‐3‐(cyclohexylamino)‐2,3‐dihydro‐1H‐inden‐1‐one (BCI) as novel allosteric inhibitors of dualspecificityphosphatase 6 (DUSP6). One compound, BCI‐215, exhibited similar activity to parent compound BCI but lacked organismal