Electrophilic fluorinations of lithiated bis-lactim ethers derived from cyclo-[L-AP4-D-Val] allow a direct access to α-monofluorinated phosphonate mimetics of naturally occurring phosphoserine and phosphothreonine, in enantiomerically pure form and suitably protected for solid-phase peptide synthesis.
从环-[L-AP4-
D-缬氨酸]衍生出的
锂化双内酯醚的亲电
氟化反应,可直接获得天然存在的δ-单
氟化
膦酸盐模拟物
磷丝氨酸和
磷苏
氨酸,其对映体纯度高,并为固相肽合成提供了适当的保护。