Cu(<scp>ii</scp>)/SPDO complex catalyzed asymmetric Baeyer–Villiger oxidation of 2-arylcyclobutanones and its application for the total synthesis of eupomatilones 5 and 6
作者:Chang-Sheng Zhang、Ya-Ping Shao、Fu-Min Zhang、Xue Han、Xiao-Ming Zhang、Kun Zhang、Yong-Qiang Tu
DOI:10.1039/d2sc02079c
日期:——
3-disubstituted cyclobutanones of Baeyer–Villigeroxidation catalyzed by a Cu(II)/SPDO complex is reported for the first time, producing normal lactones in excellent enantioselectivities (up to 96% ee) and regioselectivities (up to >20/1), along with unreacted ketones in excellent enantioselectivities (up to 99% ee). The current transformation features a wide substrate scope. Moreover, catalytic asymmetric total
Ni-Catalyzed Asymmetric Hydrogenation of Aromatic Ketoacids for the Synthesis of Chiral Lactones
作者:Chen-Qiang Deng、Jin Deng
DOI:10.1021/acs.orglett.2c00608
日期:2022.4.8
asymmetric hydrogenation of aromatic γ- and δ-ketoacids has been developed, affording a series of γ- and δ-aryl lactones in high yields and excellent enantioselectivities (≤98% ee). The hydrogenation could occur smoothly on a gram scale with 0.05 mol % catalyst loading (S/C = 2000). This protocol provides an efficient and practical approach for accessing chiral lactones with important potential applications