Axial chirality in N,N‐dimethylaminopyridines as well as N,N‐dipropylaminopyridines bearing an internal carboxy group were evaluated based on their racemization barriers and circular dichroism spectra. The half‐life of racemization of N,N‐dipropylaminopyridine derivative 2 was estimated to be 19.7 days at 20°C. Its enantiomers isolated as optically active forms showed positive‐negative and negative‐positive
在轴手性Ñ,Ñ -dimethylaminopyridines以及Ñ,ñ -dipropylaminopyridines轴承基于它们的外消旋化的障碍和圆二色光谱的内部羧基进行了评价。N,N-二丙基
氨基
吡啶衍生物2的外消旋半衰期在20°C下估计为19.7天。以旋光形式分离出的对映体在310至210 nm处分别显示(+)- 2和(-)- 2的正负棉花效应。此外,(−)‐ 2 用作手性亲核催化剂,并在1-(1-
萘基)
乙烷-1-醇的酰基动力学拆分中表现出不对称诱导作用。