3-isomers in good yields. Moreover, an unexpectedly high level of regio-selectivity is observed with the alkenylborates possessing the prostaglandin (PG) ω-chain structure. The present reaction is successfully applied to the asymmetric synthesis of PG intermediates 9, 15, 16.
链烯基
硼酸锂与4-
环戊烯-1,3
-二醇的单
乙酸酯在
镍催化剂下区域选择性和立体定向偶联,以高收率得到反式1,3-异构体。此外,在具有
前列腺素(
PG)ω-链结构的烯基
硼酸盐中观察到了出乎意料的高区域选择性。本反应成功地应用于
PG中间体的不对称合成9,15,16。