专利号:US-2022048879-A1 优先权日:2020-08-13 标 题:Synthesis of small molecules inspired by Phomoxanthone A 发明人:ALI RAMEEZ; MATTSON ANITA 权利人:WORCESTER POLYTECH INST 摘要:Methods, compositions, and kits are provided for synthesizing bioactive chromane, the method including: constructing a tertiary ether stereocenter enantioselectively by catalyzed alkynylation of a substituted chromenone to obtain a chromanone; reducing alkyne and ketone in the chromanone to obtain a chroman; and converting ester to methyl group thereby obtaining chromane.
专利号:US-3953604-A 优先权日:1972-01-14 标 题:1-(2-Substituted-chromonyloxy)-2-hydroxy-3-(substituted phenoxy)propanes 发明人:WARREN BRIAN THOMAS; SPICER JOHN WILLIAM 权利人:MILES LAB 摘要:Definitions: in the following Formulae I, II and IV, R 1 represents hydrogen, alkyl of 1 to 4 carbon atoms, or a nontoxic cation, while each of R 2 , R 3 , R 4 , R 5 , and R 6 symbolizes hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, carboxy, carbalkoxy of 1 to 4 carbon atoms, trihalomethyl, halogen, nitro or cyano. n Certain 1-(2-substituted-chromon-yloxy)-2-hydroxy-3-(substituted-phenoxy)propanes (Formula I), ##SPC1## n can be synthesized from intermediate bis-(substituted-phenoxy)propanes (Formula II), ##SPC2## n by condensation with diethyl oxalate in the presence of sodium ethoxide followed by cyclization with a mixture of glacial acetic acid and concentrated sulfuric or a mixture of concentrated hydrochloric acid and a lower alcohol containing up to 4 carbon atoms. n The bis-(substituted-phenoxy)propane intermediates (Formula II) are prepared by reacting a dihydroxyacetophenone (Formula III), ##SPC3## n with a (substituted-phenyl)glycidyl ether (Formula IV), ##SPC4## n in an organic solvent in the presence of a catalyst. n The 1-(2-substituted-chromon-yloxy)-2-hydroxy-3-(substituted-phenoxy)propanes (Formula I) are useful in the treatment of allergic conditions in mammals. The bis-(substituted-phenoxy)propanes (Formula II) are useful as intermediates in the synthesis of the latter compounds. Methods of preparing compounds having Formulae I and II are described. Methods of treating allergic conditions in mammals utilizing compounds of Formula I are also disclosed.
专利号:US-3928347-A 优先权日:1968-11-08 标 题:Pyrazinylmalonic acid esters and salts and pyrazinylacetic acids, esters and salts 发明人:SCHWARTZ NORMAN; MOHRBACHER RICHARD J 权利人:MCNEILAB INC 摘要:The compound, 2,3-diphenyl-5-ethylpyrazine, useful as a precursor in the synthesis of those compounds of the class of pyrazine, arylpyrazine, diphenylpyrazine, and cycloalkylpyrazine malonates, acetates, acetamides, and acetic acids, useful for their ultraviolet light absorption properties.
专利号:US-4046763-A 优先权日:1968-11-08 标题:2,3-Diphenyl-5-ethylpyrazine 发明人:SCHWARTZ NORMAN; MOHRBACHER RICHARD J 权利人:MCNEILAB INC 摘要:The compound 2,3-diphenyl-5-ethyl-pyrazine, useful as a precursor in the synthesis of those compounds of the class of pyrazine, arylpyrazine, diphenylpyrazine, and cycloalkylpyrazine malonates, acetates, acetamides, and acetic acids, useful for their ultraviolet light absorption properties.
专利号:CN-104230784-B 优先权日:2014-09-02 标题 :Synthesis of 1-aryl-2-(3-methyl-2-indolyl)-1,2-ethanedione derivatives
专利号:CN-104230784-A 优先权日:2014-09-02 标题 :Synthesis of 1-aryl-2-(3-methyl-2-indolyl)-1,2-ethanedione derivatives
参考标题:Diamination/oxidative Cross-Coupling/bicyclization Of Anilines And Methyl Ketones: Direct I2-Promoted Synthesis Of 1,2-Fused Oxindoles 作者:Jingjing Zhang,Xia Wu,Qinghe Gao,Xiao Geng,Peng Zhao,Yan-Dong Wu,Anxin Wu |发布日期:2017.1.20 摘要:2-Fused Oxindoles From Methyl Ketones And Anilines. This Approach Was Optimized, Resulting In A Concise And Atom-Economical Approach For The One-Pot Construction Of 1,2-Fused Oxindoles From Methyl Ketones And Anilines Rather Than Using Preexisting Indolin-3-Ones Or Indoles. Mechanistic Studies Revealed That The Key Step Involved An Oxidative Cross-Coupling Between In Situ Generated Phenylglyoxal And α
合成参考文献
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