Biomimetic aerobic oxidation of primary benzylic amines has been achieved by using a quinone catalyst. Excellent selectivity is observed for primary, unbranched benzylic amines relative to secondary/tertiary amines, branched benzylic amines, and aliphatic amines. The exquisite selectivity for benzylic amines enables oxidative self-sorting within dynamic mixtures of amines and imines to afford h...

This study was an attempt to analyze the applications and problems of conducting blended learning (BL) in view point of the agricultural students from Bu-Ali Sina University. The study has employed a surveying methodology with interviewing and included a combination of descriptive and quantitative research methods. Statistical population of the study included 500 agricultural students from Bu-A...

2,6-diaminopyridine is extensively used as a pharmaceutical intermediate and a hair dye coupler as oxidation formulations. it is soluble in protic solvents. primary and secondary amines are n-methylated by various methods such as direct alkylation of amines with hofmann mechanism, but in many of these methods due to overalkylations, we earn a mixture of amino products. consequently, they aren't...

2,6-diaminopyridine is extensively used as a pharmaceutical intermediate and a hair dye coupler as oxidation formulations. It is soluble in protic solvents. Primary and secondary amines are N-methylated by various methods such as direct alkylation of amines with Hofmann mechanism, but in many of these methods due to overalkylations, we earn a mixture of amino products. Consequently, they aren't...

We have introduced a selective synthesis of tertiary amines using alkyl halide and ammonium salts as the amine sources in water. This green process has outstanding superiorities, such as being eco-friendly, possessing ammonium salts, and using water as a green solvent in the absence of organic ligands or catalysts. It is worth mentioning that the presence of t-Butyl alcohol and potassi...

Blended online learning is an emerging variation of blended learning. Whereas blended learning enhances face-to-face classroom instruction by adding asynchronous online instruction via a learning management system, blended online learning adds synchronous online learning via web conferencing to enhance otherwise asynchronous online courses. Blended online learning can potentially attract season...

Expanding a tool for predicting chloride diffusivity in concrete so it can be used by manufacturers to evaluate the durability of concrete made with blended cements. Part I: Characterizing blended cement materials. Expanding a tool for predicting chloride diffusivity in concrete so it can be used by manufacturers to evaluate the durability of concrete made with blended cements. Part I: Characte...

Nitriles were found to be highly effective alkylating reagents for the selective N-alkylation of amines under catalytic hydrogenation conditions. For the aromatic primary amines, the corresponding secondary amines were selectively obtained under Pd/C-catalyzed hydrogenation conditions. Although the use of electron poor aromatic amines or bulky nitriles showed a lower reactivity toward the reduc...

Blended learning implementation has been extensively examined in literature. Most research questions center around how blended learning results in greater learning achievement, which HAS been measured from a student’s perspective. Whilst being recognized as existing in varied models, how blended learning design may be different in hard and soft disciplines is scarcely researched. In addition, t...

This research has two aims: (1) to bridge a gap in blended learning research — the lack of a systems approach to the understanding of blended learning research and practice, and (2) to promote a more comprehensive understanding of what has been achieved and what needs to be achieved in blended learning research and practice. To achieve these aims, we first assess the strengths and limitations i...