Synthesis of 8a-Chlorotetrahydropyrrolo[1,2-H]pyrazine-1,6,7-(2H)-triones from 3-Methylidenepiperazin-2-ones and Oxalyl Chloride
摘要:
(Z)-1-Aryl-3-(2-aryl-2-oxoethylidene)piperazin-2-ones react with oxalyl chloride at cooling with the formation of (Z)-2-aryl-8-[hydroxy(aryl)methylidene]-8D degrees-chlorotetrahydropyrrolD 3/4 [1,2-a]pyrazine-1,6,7(2H)-triones. At heating HCl is eliminated from them to produce 8-aroyl-3,4-dihydropyrrolD 3/4 [1,2-D degrees]pyrazine- 1,6,7(2H)-triones.
Synthesis of 8-aroylpyrrolo[1,2-a]pyrazine-1,6,7(2H)-triones and their reaction with water. New analogs of cyclic dipeptides
摘要:
2-Aryl-8-aroyl-3,4-dihydropyrrolo[1,2-a]pyrazine-1,6,7(2H)-triones prepared from (Z)-1-aryl-3-(2-aryl-2-oxoethylidene)piperazin-2-ones and oxalyl chloride react with water to afford (E)-8D degrees-hydroxy-2-aryl-8-[aryl(hydroxy)methylene]tetrahydropyrrolo[1,2-a]pyrazine-1,6,7(2H)-triones. The crystal and molecular structure of 8-benzoyl-2-phenyl-3,4-dihydropyrrolo[1,2-a]pyrazine-1,6,7(2H)-trione and (E)-8D degrees-hydroxy-8-[hydroxy(phenyl)methylene]-2-phenyltetrahydropyrrolo[1,2-a]pyrazine-1,6,7(2H)-trione were studied by X-ray diffraction analysis.
Synthesis of 8-aroylpyrrolo[1,2-a]pyrazine-1,6,7(2H)-triones and their reaction with water. New analogs of cyclic dipeptides
作者:A. V. Chervyakov、P. A. Slepukhin、M. V. Dmitriev、A. N. Maslivets
DOI:10.1134/s1070428015110123
日期:2015.11
2-Aryl-8-aroyl-3,4-dihydropyrrolo[1,2-a]pyrazine-1,6,7(2H)-triones prepared from (Z)-1-aryl-3-(2-aryl-2-oxoethylidene)piperazin-2-ones and oxalyl chloride react with water to afford (E)-8D degrees-hydroxy-2-aryl-8-[aryl(hydroxy)methylene]tetrahydropyrrolo[1,2-a]pyrazine-1,6,7(2H)-triones. The crystal and molecular structure of 8-benzoyl-2-phenyl-3,4-dihydropyrrolo[1,2-a]pyrazine-1,6,7(2H)-trione and (E)-8D degrees-hydroxy-8-[hydroxy(phenyl)methylene]-2-phenyltetrahydropyrrolo[1,2-a]pyrazine-1,6,7(2H)-trione were studied by X-ray diffraction analysis.
Synthesis of 8a-Chlorotetrahydropyrrolo[1,2-H]pyrazine-1,6,7-(2H)-triones from 3-Methylidenepiperazin-2-ones and Oxalyl Chloride
作者:А. V. Chervyakov、М. V. Dmitriev、А. N. Maslivets
DOI:10.1134/s1070428018050263
日期:2018.5
(Z)-1-Aryl-3-(2-aryl-2-oxoethylidene)piperazin-2-ones react with oxalyl chloride at cooling with the formation of (Z)-2-aryl-8-[hydroxy(aryl)methylidene]-8D degrees-chlorotetrahydropyrrolD 3/4 [1,2-a]pyrazine-1,6,7(2H)-triones. At heating HCl is eliminated from them to produce 8-aroyl-3,4-dihydropyrrolD 3/4 [1,2-D degrees]pyrazine- 1,6,7(2H)-triones.