An asymmetric protocol for the synthesis of novel benzofused ϵ-lactones starting from quinone methides and activated acetic acid esters using chiral isothiourea Lewis base catalysts has been developed.
已经开发了一种不对称方案,用于使用手性异硫脲 Lewis 碱催化剂从醌甲化物和活性乙酸酯合成新型苯并化 ε-内酯。
Access to Chiral β-Boryl δ-Lactones via NHC-Catalyzed [4 + 2] Annulation
作者:Zhipeng Li、Jingyang Zhang、Jian Wang
DOI:10.1021/acs.orglett.4c00426
日期:2024.3.8
efficient method to build enantioenriched organoborones with two consecutive stereogenic centers. It is worth noting that this protocol represents a new organocatalytic manner to generate chiral β-C–B bonds. Moreover, it also greatly enriches the structural diversity of the chiral organoboroncompounds.