نتایج جستجو برای: 23 dihydroquinazolin 41h ones
تعداد نتایج: 306686 فیلتر نتایج به سال:
A variety of 4-phosphinylpyrrolidin-3-ones was prepared via a [3+2] cycloaddition between aryl aldonitrones and phosphinylallenes. The products were isolated as unique 4,5-trans diastereomers, in yields up to 80% over 23 examples. In the case chiral racemic allenes, 2:1 4:1 moderate 2,5-diastereoselectivity observed. Under reaction conditions, cycloadducts directly undergo rearrangement afford ...
In this study some new compounds have been prepared including thereaction of diazoium salt 1,4-phenylenediamine with 2-mercaptobenzaldehyde at (0-5)0C[F1]. Then Schiff bases [F2-F6] werethen synthesized through the reaction compound [F1] withsubstituteds aniline in absolute ethanol, and were convertedinto 2,3 - dihyroquinazolin 4(1H) one derivatives [F7-F11] by 2-amino benzoic acid ethanol. The...
nothing affects learners more than assessment, so it is important to involve them in assessment process. involvment of learners in assessment helps them to become autonoumos learners. despite this importance iranian learners specialy javanroodian ones are not activily involved in the process. hence the aim of this thesis is to invesrtigate thier ability in th eassessment process
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