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Improved Protocol for Thorpe Reaction: Synthesis of 4‐Amino‐1‐arylpyrazole using Solid–Liquid Phase‐Transfer Conditions
作者:Nirmal D. Desai、Rina D. Shah
DOI:10.1080/00397910701767023
日期:2008.1.1
Solid - liquid phase-transfer conditions were employed for the first time in the Thorpe reaction to synthesize 4-amino-1-aryl-3,5-substituted-1H-pyrazoles 3. Aryl amines were diazotized and coupled with various active methylene compounds such as cyano acetamide, cyanoacetophenone, malononitrile, and ethyl cyanoacetate, resulting into alpha-arylhydrazononitriles 1. Cyclization of 1 using alpha-bromo ketones or esters resulted in compounds 3.
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Elnagdi Mohamed Hilmy, Elghandour Ahmed Hafez Hussien, Harb Abdel Fattah +, Heterocycles, 38 (1994) N 4, S 739-750
作者:Elnagdi Mohamed Hilmy, Elghandour Ahmed Hafez Hussien, Harb Abdel Fattah +
DOI:——
日期:——
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GEWALD, K.;CALDERON, O.;SCHAEFER, H.;HAIN, U., LIEBIGS ANN. CHEM., 1984, N 7, 1390-1394
作者:GEWALD, K.、CALDERON, O.、SCHAEFER, H.、HAIN, U.
DOI:——
日期:——
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SULO, P.;STURDIK, E.;LIPTAJ, T.;JAKUBIK, T.;ANTALIK, M., COLLECT. CZECHOSL. CHEM. COMMUN., 1985, 50, N 2, 375-382
作者:SULO, P.、STURDIK, E.、LIPTAJ, T.、JAKUBIK, T.、ANTALIK, M.
DOI:——
日期:——
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KAMAI, MOHAMED;IBRAHIM, AHMED;EL-MOGHAYAR, MOHAMED RIFFAT HAMZA, INDIAN J. CHEM., 26,(1987) N 9, 832-835
作者:KAMAI, MOHAMED、IBRAHIM, AHMED、EL-MOGHAYAR, MOHAMED RIFFAT HAMZA
DOI:——
日期:——