the adducts 9n (5′R,6′R) and 10n (5′S,6′R) as single diastereomers, respectively. Finally, the (5′R) configurated enoate 6n turned out to be valuable as a chiral building block for an EPC synthesis of (+)-heptelidic acid.
将(H 2 C = CH)2 CuLi共轭添加到6n和7n中,分别得到加合物9n(5'R,6'R)和10n(5'S,6'R)为单一非对映体。最终,(5'R)构型的烯酸酯6n作为(E)
庚二酸的EPC合成的手性构件很有价值。