4-Hydroxy-5-amino-6-phenyl-4-hexanolide has been synthesized under its cyclized form (lactone 5) from a very inexpensive chiral starting material, L-glutamic acid. The key steps were an original reduction of carbonyl of a ketone with n-Bu3SnH in the presence of silica gel, followed by an SN2 displacement of a mesylate group with sodium azide
由非常廉价的手性原料
L-谷氨酸以其环化形式(内酯5)合成了
4-羟基-5-
氨基-6-苯基-
4-己内酯。关键步骤是在
硅胶存在下,先用n-Bu 3 SnH还原酮的羰基,然后再用
叠氮化
钠将SN 2取代为
甲磺酸盐基团。