C-Benzotriazole bonds were selectively transformed to give the corresponding alpha-aminocarbanions when N-(alpha-aminoalkyl)benzotriazoles were reacted with either Li/LiBr or SmI2 in the presence of representative electrophiles. The ranges of applicability of the two reagents complement each other, and together the two protocols provide a general route from readily available crystalline starting materials to a variety of ''nonstabilized'' alpha-aminocarbanions that can be trapped in moderate to good yields.
Tosylmethylamines as “Nonstabilized” α-Aminocarbanion Synthon Equivalents: Advantages and Limitations
作者:Alan R. Katritzky、Daming Feng、Ming Qi
DOI:10.1021/jo970733a
日期:1997.9.1
Tosylmethylamines (1) are advantageous synthon equivalents for ''nonstabilized'' alpha-aminocarbanions of aromatic amines, Clean reactions and high yields are observed provided one-step procedures are utilized: the intermediate ''nonstabilized'' alpha-aminocarbanions are of low stability, Reactions formally involving dianions from bis(tosylmethyl)-substituted amines have also been achieved.
作者:Alan R. Katritzky、Ming Qi、Daming Feng、Daniel A. Nichols
DOI:10.1021/jo962247d
日期:1997.6.13
C-Benzotriazole bonds were selectively transformed to give the corresponding alpha-aminocarbanions when N-(alpha-aminoalkyl)benzotriazoles were reacted with either Li/LiBr or SmI2 in the presence of representative electrophiles. The ranges of applicability of the two reagents complement each other, and together the two protocols provide a general route from readily available crystalline starting materials to a variety of ''nonstabilized'' alpha-aminocarbanions that can be trapped in moderate to good yields.