Chiral N-heterocyclic carbene catalyzed annulation of α,β-unsaturated aldehydes with 1,3-dicarbonyls
作者:Zhi-Qiang Zhu、Xing-Liang Zheng、Ning-Fei Jiang、Xiaolong Wan、Ji-Chang Xiao
DOI:10.1039/c1cc12778k
日期:——
Chiral N-heterocyclic carbene catalyzed annulations of ynals and enals with 1,3-dicarbonyls have been described. The two reactions provided direct and efficient methods for enantioselective synthesis of functionalized dihydropyranones. Comparatively, the reactions starting from ynals were atom-economical; furthermore the reactions of enals demonstrated broader substrate compatibility.
已经描述了手性N-杂环卡宾催化的具有1,3-二羰基的烯醛和烯醛的环。这两个反应为功能化二氢吡喃酮的对映选择性合成提供了直接和有效的方法。相比之下,从自醛开始的反应是原子经济的。此外,烯醛的反应证明了更广泛的底物相容性。