摘要 合成了 12 种 1-甲基-1,2-二氢-2-苯甲酰基亚甲基喹啉,并通过 1 H、 13 C 和 15 N NMR、UV-Vis 和 X 射线方法阐明了它们的结构。结果明确表明,这些化合物和相应的 1,2-二氢-2-苯甲酰基亚甲基喹啉在结晶和溶液状态下分别是 Z 和 E 异构体。X 射线结构的比较表明,与其 1-甲基衍生物相比,(Z)-1,2-二氢-2-苯甲酰基-亚甲基喹啉的扭曲程度更小。这种差异是由于准芳香族六元环的形成引起的,该六元环由未甲基化同类物中的分子内氢键稳定,由 N-甲基化阻止。
This study presents an efficient strategy for constructing 1,2-difunctionalized quinolinederivatives via the multicomponent cascade coupling of N-heteroaromatics with alkyl halides and different terminal alkynes. This reaction was achieved through sequential functionalization at the one- and two-positions of quinolines, which displayed a broad substrate scope, environmental friendliness, excellent
X-ray methods. The results unambiguously show that these compounds and the corresponding 1,2-dihydro-2-benzoylmethylenequinolines both in crystalline and in solution state are the Z and E isomers, respectively. Comparison of the X-ray structures reveal that ( Z )-1,2-dihydro-2-benzoyl-methylenequinolines are less twisted as compared to their 1-methyl derivatives. This difference is caused by formation of
摘要 合成了 12 种 1-甲基-1,2-二氢-2-苯甲酰基亚甲基喹啉,并通过 1 H、 13 C 和 15 N NMR、UV-Vis 和 X 射线方法阐明了它们的结构。结果明确表明,这些化合物和相应的 1,2-二氢-2-苯甲酰基亚甲基喹啉在结晶和溶液状态下分别是 Z 和 E 异构体。X 射线结构的比较表明,与其 1-甲基衍生物相比,(Z)-1,2-二氢-2-苯甲酰基-亚甲基喹啉的扭曲程度更小。这种差异是由于准芳香族六元环的形成引起的,该六元环由未甲基化同类物中的分子内氢键稳定,由 N-甲基化阻止。