Dirhodium(II) complex-catalyzed [3 + 2] reactions between N-arylaminocyclopropanes and alkyne derivatives are described. The cycloaddition products proved to be versatile synthetic intermediates. trans-Cyclic β-amino acids and derivatives thereof can be conveniently synthesized using this cycloaddition protocol.

Abstract. As the first form of human visual language, simple strokes use highly general means to extract the typical characteristics of the image of objects, to create a geometric, simple image of the various. Sports simple strokes is simple, vivid, humorous, and a handful of pens which can deliver rich language connotations, clearly portraying language scenes, traditional media and slides, tapes, videotapes, Computer and other modern media complement each other, shared with the transfer of teaching information to achieve the mission of teaching mission, the students of independent learning, innovative learning and cooperative learning is quite enlightening significance.

The management of college students as a way to promote the quality of teaching in colleges and universities to promote teaching reform has always been the focus of the work of colleges and universities in China.In the actual management of college students, student management has shown the survival of the main state of decline, and this student lost the survival of the main reason is because the student's personal subject generated by the presupposition of the purpose of restrictions and uniform management model limits.On the current practice of most of the students in our country, there are still some disciplines, organizational space programming and other issues, and ultimately led to the loss of student subjects.This paper analyzes the causes of the loss of students 'development in the reform of college students' management, and puts forward some concrete suggestions on the path of college student management reform.