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214.389  Articles
1 of 21.440 pages  |  10  records  |  more records»
? ????? ?????? ? ???? ???????????????????????????? ?????? ?????? ? ???????????????? ????????????? ???????? ????????? 4-?????-5-???????????????? ?? ????????????? ???????? ??????????? ???? [(1-????-5-??????????????-4-??)???]????????? ???????. ?????????? ???... see more

Aryl isocyanates were found to react regioselectively with 1-(arylimino)-1H-isoindol-3-amines by exocyclic nitrogen atom of amino group to form N-phenyl-N'-[3-(arylimino)-2,3-dihydro-1H-isoindol-1-ylidene]ureas in high yields. The structure of compounds f... see more

This study is devoted to development of the optimal conditions for synthesis and the study of some “structure – antioxidant activity” regularities of [(1-arylimidazole-5-yl)methylthio]alkane carboxylic acids, which structural analogues have found an appli... see more

?? ????????? ?????? ??? ?????????? ??????????, ?????????? ????????? ??????? ????? ? ????????????? ????????? ? ??????????, ????????? ? ?????????? ?????????????. ?????????? ??????????, ??? ??????????? ? ?????? 1,2,4-???????? ? 1,2,3,4-?????????? ?????????? ... see more

 ???????? ???????????? ?????????? ????????? ???????????? ???????? ???????? ?????????? ?????????? ???????? ????? ?????????? ???????? ??????. ???? ?????????? ? ?????????????? ?????? ?? ??????????? ?????????? ????? ??????? ? ??????? ??????? ? ???????? ?... see more

Previously designated a comfortable and effective scheme of 3,7-disubstituted [1,2,4]triazolo[4,3-a]pyrazin-8(7H)-ones synthesis was spread to derivatives of ?-(7-aryl-8-oxo-7,8-dihydro[1,2,4]triazolo[4,3-a]pyrazin-3-yl) alkylcarboxylic acids. Our approac... see more

Previously designated a comfortable and effective scheme of 3,7-disubstituted [1,2,4]triazolo[4,3-a]pyrazin-8(7H)-ones synthesis was spread to derivatives of ?-(7-aryl-8-oxo-7,8-dihydro[1,2,4]triazolo[4,3-a]pyrazin-3-yl) alkylcarboxylic acids. Our approac... see more

Writing is language ability that very important for all human life. Writing helps someone to think easily and to express all idea, thought and feeling existing in mind in written form. The purpose of this research is to explore 5W+1H Questions in enhancin... see more

Writing is language ability that very important for all human life. Writing helps someone to think easily and to express all idea, thought and feeling existing in mind in written form. The purpose of this research is to explore 5W+1H Questions in enhancin... see more

1 of 21.440 pages  |  10  records  |  more records»