<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.
Dual Role of Aryl Iodide in Cascade C–H Arylation/Amination: Arylation Reagent and Cocatalyst for C–N Formation
作者:Deng-Yuan Li、Shuo Liu、Shuang Chen、An Wang、Xiao-Ping Zhu、Pei-Nian Liu
DOI:10.1021/acscatal.8b01071
日期:2018.7.6
arylation/amination protocol using homoallylic primary amines as the starting materials in the presence of a palladium catalyst produces 2-aryl-1-pyrrolines with excellent regioselectivity and in good yields. Mechanistic studies indicate that this transformation proceeds via palladium-catalyzed Heck coupling, C–H amination, and tautomerization. As an unprecedented example of aryliodide acting as an arylation
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.
Synthesis of multisubstituted pyrroles by ligand-controlled site-selective arylation and their transformation into multiarylated pyrrolines and pyrrolidines
Multisubstituted pyrroles were prepared by Pd-catalyzed site-selective arylation of 2,5-disubstituted 1H-pyrroles with aryl chlorides, triflates, or nonaflates. Site-selectivity of the reaction was controlled using appropriate ligands, and 2,2,5-trisubstituted 2H-pyrroles were synthesized via dearomative C2-arylation. Moreover, 2,3,5-trisubstituted 1H-pyrroles were successfully fabricated by direct