t-butyl 2-ethylacetoacetate 、
(1R)-2-endo-propenoyl-1,7,7-trimethylbicyclo[2.2.1]heptan-2-ol 在
copper(II) bis(trifluoromethanesulfonate) 作用下,
反应 24.0h,
以57%的产率得到(R)-tert-butyl 2-acetyl-2-ethyl-5-[(2R)-2-hydroxy-1,7,7-trimethylbicyclo[2.2.1]heptan-2-yl]-5-oxopentanoate