Asymmetric Reaction of α-Diazomethylphosphonates with α-Ketoesters To Access Optically Active α-Diazo-β-hydroxyphosphonate Derivatives
作者:Fei Du、Jiao Zhou、Yungui Peng
DOI:10.1021/acs.orglett.7b00128
日期:2017.3.17
The first example for asymmetric reaction of diazomethylphosphonates with α-ketoesters was realized in the catalysis of hydroquinidine-derived bifunctional thiourea. A methodology was established to access a series of chiral α-diazo-β-hydroxyphosphonate derivatives containing various functional groups with high enantioselectivities and yields. The resulting products could be further transformed into
The Direct Asymmetric Vinylogous Aldol Reaction of Furanones with α-Ketoesters: Access to Chiral γ-Butenolides and Glycerol Derivatives
作者:Jie Luo、Haifei Wang、Xiao Han、Li-Wen Xu、Jacek Kwiatkowski、Kuo-Wei Huang、Yixin Lu
DOI:10.1002/anie.201006316
日期:2011.2.18
Twice as good: The title reaction using the tryptophan‐derived bifunctional organic catalyst 1 has been developed. The reported method led to the synthesis of chiral γ‐substituted butenolides in excellent yields, with high diastereo‐ and enantioselectivities. Facile synthesis of chiralglycerolderivatives containing a tertiary hydroxy group has also been demonstrated.