Catalytic Asymmetric Synthesis of Phosphoryl-1,4-dihydropyridazines<i>via</i>an Enantioselective Allylic Alkylation/1,3-Dipolar Cycloaddition/Rearrangement Reaction Sequence
作者:Fei Du、Liyang Yin、Yanqiang Ning、Yungui Peng
DOI:10.1002/adsc.201600353
日期:2016.7.14
A novel methodology has been developed for the synthesis of chiral phosphoryl‐1,4‐dihydropyridazine derivatives based on an asymmetric allylic alkylation/intramolecular 1,3‐dipolar cycloaddition/rearrangement reaction sequence, various chiral 3‐phosphoryl‐4‐aryl‐1,4‐dihydropyridazine‐5‐carboxylates were achieved in high yields with high enantioselectivities. Moreover, chiral 4,5‐dihydropyridazinone
基于不对称的烯丙基烷基化/分子内的1,3-偶极环加成/重排反应序列,各种手性的3-磷酰基-4-芳基-1, 4-二氢哒嗪-5-羧酸盐以高收率和高对映选择性获得。此外,通过降低森田-贝利斯-希尔曼碳酸盐和α-重氮膦酸盐的烯丙基烷基化产物,还可以容易地提供手性4,5-二氢哒嗪酮衍生物。