investigated by using the aziridine ring capability to act as a directing metalation group. Trapped with electrophiles, the resulting o-aziridinyl benzyllithium 1-Li gives access to several functionalized aziridines 2a−j. The hydroxyalkylated derivatives 2d−j were converted into important scaffolds such as isochromans 3a−d. A stereoselective preparation of isochromans (R)-3b, (1R,3S)-3d, and (1R,3R)-3d has been
Herein we report a new straightforward synthesis of cis and trans 2,5-disubstituted N,N-dialkylpiperazines, even in enantioenriched form, by reacting non-activated N-alkyl arylaziridines in the presence of a catalytic amount of a Lewis acid. A stereochemical and NMR investigation revealed useful mechanistic insights for this process.
New Arylaziridinyldifluoroborates: Useful Suzuki-Miyaura Reagents
作者:Renzo Luisi、Arianna Giovine、Saverio Florio
DOI:10.1002/chem.200902056
日期:——
Blossoming promises fruit! A new class of shelf stable organoboron reagents has been obtained from ortho‐ and laterally lithiated aziridines and benzylamines. Their usefulness as Suzuki–Miyaura reagents has been investigated, proving that they could be fruitful reagents for the preparation of arylated aziridines and benzylamines, even in enantioenriched form, and promising new bifunctional Lewis pairs