专利号:US-8933248-B2 优先权日:2012-06-21 标 题:3-substituted-3-hydroxy oxindole derivatives and process for preparation thereof 发明人:RAO MANDAPATI MOHAN; PRATHIMA PARVATHANENI SAI 权利人:COUNCIL SCIENT IND RES 摘要:The present invention relates to expedient method for synthesis of 3-substituted-3-hydroxy-oxindole derivatives, which are useful as synthetic precursors to valuable pharmaceutical compounds. These are synthesized by reacting nitromethane with the corresponding isatins of formula (I). The reaction process of isatins was carried using water as a solvent at room temperature to form the corresponding 3-hydroxy-3-nitromethylindolin-2-ones of formula (II).
专利号:CN-111187233-B 优先权日:2020-01-18 标 题:A kind of multi-substituted benzothiazole and its derivatives and its synthesis method
参考标题:Autoxidation/aldol Tandem Reaction Of 2-Oxindoles With Ketones: A Green Approach For The Synthesis Of 3-Hydroxy-2-Oxindoles 作者:Qing-Bao Zhang,Wen-Liang Jia,Yong-Liang Ban,Yong Zheng,Qiang Liu,Li-Zhu Wu |发布日期:2016.2.18 摘要:In The Presence Of Tetrabutylammonium Fluoride And Molecular Sieves (Ms) 4 å In Dmf, An Efficient Autoxidation Reaction Of 2‐oxindoles With Ketones Under Air At Room Temperature Has Been Developed. This Approach May Provide A Green, Practical, And Metal‐free Protocol For A Wide Range Of Biologically Important 3‐hydroxy‐3‐(2‐oxo‐alkyl)‐2‐oxindoles.
合成参考文献
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