Enantio- and diastereoselective synthesis of threo 2 and erythro 3 was accomplished by the conversion of 1 with aldehydes promoted by chiral borane 10; enantioselctivities range from 45–95% ee, while diastereoselectivities vary from 4.3–49∶1 with 8 different aldehydes.
通过在1的手性
硼烷10的催化下与醛反应,实现了2和3的对映选择性合成;对映选择性为45-95% ee,而与8种不同醛的反应,非对映选择性为4.3-49∶1。