Synthesis of 2-cyanoacrylamides through Pd-catalyzed monohydration of methylenemalononitriles
摘要:
A straightforward and efficient method has been developed for the synthesis of 2-cyanoacrylamide from 2-methylenemalononitriles through monohydration. A series of methylenemalononitriles underwent the reaction under mild and simple reaction conditions with good to excellent yield.[GRAPHICS].
SYNTHESIS OF SOME NEW HETEROCYCLIC COMPOUNDS FROM BENZOPYRANO[2,3-c]PYRAZOL-3-ONE DERIVATIVES
作者:A. Khodairy
DOI:10.1081/scc-100105398
日期:2001.1.1
The reaction of benzopyrano[2,3-c]pyrazol-3-one (1) with some active halo compounds, afforded compounds 4, 8 and 12, respectively. The cyanoethyl derivative 19 was synthesized and treated with active methylenes and sulfur or benzoylisothiocyanate and phenacyl bromide, to give compounds 24a,b and 27. Compounds 25a,b and 28 were obtained through the reaction of compounds 24a,b with acrylonitrile or compound
Synthesis of Polyfused Thieno(2,3- b )thiophenes Part 3: Synthesis of Thienopyrimidinotetrazole, Thienopyrimidinotriazepine, Thienopyrimidinotriazine, Thienopyrimidinotriazole and Pyrazolylthienopyrimidine Derivatives
作者:A. Khodairy
DOI:10.1080/10426500307790
日期:2003.4
2,9-Dihydrazinobipyrimidino(2,3- b )thienothiophene ( 2 ) was reacted with nitrous acid, ethoxymethylenemalononitrile, bromomalononitrile, triethyl formate, CS 2 or isatine to afford the corresponding tetrazole, triazepine, triazine, and triazole derivatives 3-8 respectively. Treatment of compound 2 with cyclohexylidenenitriles, acetylacetone, ethyl acetoacetate, 2-hydroxyacetophenone, or S,S-acetals
PROCESS FOR PREPARING CYCLOHEXANEDIACETIC ACID MONOAMIDE
申请人:Danieli Bruno
公开号:US20070208175A1
公开(公告)日:2007-09-06
A new process is described for synthesising cyclohexanediacetic acid monoamide, a key compound in the synthesis of grabapentin precursors. The process of the invention is characterised by reacting cyclohexanone with cynoacetamide and immediately after, with a suitable malonic acid ester. A new intermediate (5-cyano-2,4-dioxo-3-azaspiro[5,5]undecane-1-carboxylic acid ester) is obtained which is convertible, under mild reaction conditions, into cyclohexanediacetic acid monoamide.
Process for preparing cyclohexanediacetic acid monoamide
申请人:Serichim S.R.L.
公开号:US07381823B2
公开(公告)日:2008-06-03
A new process is described for synthesising cyclohexanediacetic acid monoamide, a key compound in the synthesis of grabapentin precursors. The process of the invention is characterised by reacting cyclohexanone with cynoacetamide and immediately after, with a suitable malonic acid ester. A new intermediate (5-cyano-2,4-dioxo-3-azaspiro[5,5]undecane-1-carboxylic acid ester) is obtained which is convertible, under mild reaction conditions, into cyclohexanediacetic acid monoamide.