The <i>N</i>-Cyclopropylimine-1-pyrroline Photorearrangement as a Synthetic Tool: Scope and Limitations
作者:Alberto Soldevilla、Diego Sampedro、Pedro J. Campos、Miguel A. Rodríguez
DOI:10.1021/jo050871x
日期:2005.8.1
[GRAPHICS]The scope and limitations of the photorearrangement of N-cyclopropylimines to 1-pyrrolines are presented. The influence on the reactivity of different substituents throughout the cyclopropane ring and at the iminic position of the N-cyclopropylimine structure is discussed. The observed effects are interpreted from computational studies. The principal findings relate to (1) the enhanced reactivity of 1-substituted compounds toward rearrangement, (2) the lack of reactivity of crowded cyclopropanes, and (3) the high chemoselectivity of the process.