NOVEL INTRAMOLECULAR CYCLIZATION OF PYRAZOLONE KETENE<i>S</i>,<i>N</i>-ACETALS FOR THE CONSTRUCTION OF METHYLSULFANYLPYRAZOLO- [4,3-b]PYRIDINES
作者:Galal H. Elgemeie、Ali M. Elzanate、Ahmed H. Elghandour、Sayed A. Ahmed
DOI:10.1081/scc-120014787
日期:2002.1
A novel and efficient method for the synthesis of 6-substituted-7,7a-dihydro-1,7a-dimethyl-7-imino-2-phenyl-1H-pyrazolo[4,3-b]pyridin-3(2H)-ones via the reaction of 4-amino-2,3-dimethyl-1-phenylpyrazolin-5-one with ketene dithioacetals and ethoxy-methylenemalononitrile or ethyl ethoxymethylene-cyanoacetate followed by intramolecular cyclization of the products has been investigated.
Cyclization reactions of nitriles. 26. Synthesis, structure, and properties of 2-amino-4-methylthio-5-cyano-6(1H)-pyrimidinethione
作者:Yu. A. Sharanin、A. M. Shestopalov、V. N. Nesterov、V. P. Litvinov、V. Yu. Mortikov、V. K. Promonenkov、V. E. Shklover、Yu. T. Struchkov
DOI:10.1007/bf00476542
日期:1987.10
SHARANIN, YU. A.;SHESTOPALOV, A. M.;NESTEROV, V. N.;LITVINOV, V. P.;MORTI+, XIMIYA GETEROTSIKL. SOED.,(1987) N 10, 1377-1384
作者:SHARANIN, YU. A.、SHESTOPALOV, A. M.、NESTEROV, V. N.、LITVINOV, V. P.、MORTI+
DOI:——
日期:——
Elgemeie, Galal H.; Elghandour, Ahmed H.; Elzanate, Ali M., Journal of the Chemical Society. Perkin transactions I, 1997, # 21, p. 3285 - 3289
作者:Elgemeie, Galal H.、Elghandour, Ahmed H.、Elzanate, Ali M.、Ahmed, Sayed A.
DOI:——
日期:——
Reaction of malononitrile with carbon disulfide in an aqueous alkaline medium [thiopyrans]