摘要
测定了一系列Ｎ甲酰基、Ｎ乙酰基环胺的１３ＣＮＭＲ谱，对甲酰基、乙酰基对于环胺上的Ｃ原子的影响进行了讨论，影响因素主要在于ＣＮ键的部分双键性。
N formyl, N acetyl pyrrolidine, piperdine, morpholine compounds are useful fine chimicals and intermediates. We have studied the substituent effects due to the presence of formyl and acetyl by 13 C NMR. The equivalence of the chemical shift of C a and C a′ and C b and C b′ is lost because of the restricted rotation of the acetyl or formyl group due to the partial double bond character of the amide C(O) N bond and steric compression.
出处
《波谱学杂志》
CAS
CSCD
北大核心
1999年第3期231-235,共5页
Chinese Journal of Magnetic Resonance
关键词
甲酰基
化合物
乙酰基
吡咯烷
哌啶
吗啡啉
NMR
N formyl compound, N acetyl compound, Pyrrolidine, Piperdine, Morpholine, Nonequivalence, Partial double bond character, Steric compression
