نتایج جستجو برای: crafts
تعداد نتایج: 2058 فیلتر نتایج به سال:
The FeCl3·6H2O-catalyzed three-component aza-Friedel-Crafts reaction of aromatic/heteroaromatic compounds, aromatic aldehydes and tert-butyl carbamate was reported. The subsequent Friedel-Crafts-type alkylation of the resulting tert-butyl diarylmethyl carbamate with heteroaromatic compounds under "open-flask" at room temperature was also performed. The two-step reaction was especially useful fo...
An enantioselective Friedel-Crafts alkylation with alpha,beta-unsaturated 2-acyl imidazoles and electron-rich aromatic nucleophiles catalyzed by bis(oxazolinyl)pyridine-scandium(III) triflate complexes has been accomplished. These alpha,beta-unsaturated 2-acyl imidazoles are effective electrophiles for the Friedel-Crafts reaction. The resulting adduct 2-acyl imidazole is easily converted to ami...
Based on the perspective of academic application and cultural dissemination, this study intends to explore the aesthetic value of Taiwan modern crafts. Through an approach of style analysis, this study examines the works selected from Taiwan Crafts Competition Award and Modern Crafts Yii Project. Both qualitative and quantitative methods are employed to explore the artistic essence and cultural...
The paper will analyze some linguistic, primarily onomastic evidence of still existent or extinct crafts and occupations within the framework of the former social structure. Many one time crafts became extinct in the course of time, but traces of their former diffusion and importance can be reconstructed from their onomastic, primarily, anthroponomastic reflections. Similar surnames motivated b...
Aryl-keto-containing α-amino acids are of great importance in organic chemistry and biochemistry. They are valuable intermediates for the construction of hydroxyl α-amino acids, nonproteinogenic α-amino acids, as well as other biofunctional components. Friedel-Crafts acylation is an effective method to prepare aryl-keto derivatives. In this review, we summarize the preparation of aryl-keto cont...
Many individuals with substance use disorders are resistant to entering formal treatment, despite the negative consequences that plague their own lives and the lives of concerned significant others (CSOs). Community Reinforcement and Family Training (CRAFT) has been developed as an effective strategy for helping family members who are concerned about the alcohol/drug use of a loved one who refu...
The functionalisation of decalin by means of an "aliphatic Friedel-Crafts" reaction was reported over fifty years ago by Baddeley et al. This protocol is of current relevance in the context of C-H activation and here we demonstrate its applicability to a range of other saturated hydrocarbons. Structural elucidation of the products is described and a mechanistic rationale for their formation is ...
Recently, digital archives for cultural heritage or arts and crafts has received attention from possibility that people can appreciate or experience the archaeological objects, the past space or arts and crafts through the computer at any time and without going to the museum or the spot. In particular, 3D reconstruction and visualization of the lost objects or past word using antique maps or pi...
the backwardness of the countryside is most important issues of developing countries. the result of this study, based on descriptive - analysis studies, shows that revive traditional arts and crafts with much charm with planning and organizing on development stimulus projects, can direct influence on the villager’s empowerment. of course, the existence of such attractions, itself, without provi...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید