<i>N</i>-Cyclopropylimine-1-pyrroline Rearrangement. A Novel Photochemical Reaction
作者:Pedro J. Campos、Alberto Soldevilla、Diego Sampedro、Miguel A. Rodríguez
DOI:10.1021/ol016847x
日期:2001.12.1
[reaction: see text] A novel aza-(vinylcyclopropane-cyclopentene) photochemical rearrangement is reported. 1-Pyrrolines are easily synthesized in good yields from N-cyclopropylimines. Hydrogen, alkyl, and aryl groups can be placed anywhere within the system, and the reaction proceeds regiospecifically.
Simple and versatile synthesis of 1-pyrroline derivatives through thermal rearrangement of N-cyclopropylimines
作者:Pedro J. Campos、Alberto Soldevilla、Diego Sampedro、Miguel A. Rodrı́guez
DOI:10.1016/s0040-4039(02)02238-4
日期:2002.12
N-Cyclopropylimines rearrange under thermal conditions to give 1-pyrrolines. The effect of imine and cyclopropane substitution is explored. This methodology allows the presence of different substituents (alkyl, alkenyl, aryl) and the reaction proceeds regiospecifically.
Mechanism of the <i>N</i>-Cyclopropylimine-1-pyrroline Photorearrangement
作者:Diego Sampedro、Alberto Soldevilla、Miguel A. Rodríguez、Pedro J. Campos、Massimo Olivucci
DOI:10.1021/ja0467566
日期:2005.1.1
We present here a combined experimental and computational investigation into the photorearrangement of N-cyclopropylimines to yield pyrrolines. We show that the photochemistry, regiochemistry, and stereochemistry of the reaction can be understood in terms of a mechanism involving barrierless evolution in three different (S(2), S(1), S(0)) singlet states and sequential decay through two different (S(2)/S(1)