(S)-Pyroglutamic Acid, (S)-Malic Acid, and (S)-Serine as Useful Starting Materials in the Synthesis of Enantiopure Hydroxyamidines
作者:Martin Ostendorf、Jan Dijkink、Floris P. J. T. Rutjes、Henk Hiemstra
DOI:10.1002/(sici)1099-0690(200001)2000:1<115::aid-ejoc115>3.0.co;2-j
日期:2000.1
The synthesis of four enantiopure hydroxyamidines is described. One amidine was obtained from (S)-pyroglutamic acid. Its key step involved the addition of phenylmagnesium bromide to the corresponding ester, affording the tertiary alcohol without detectable racemization. The second amidine was obtained by coupling of an (S)-malic acid derived N-acyliminium ion with β-naphthol. The other amidines were
描述了四种对映体纯羟基脒的合成。从(S)-焦谷氨酸获得一种脒。其关键步骤包括将溴化苯基镁添加到相应的酯中,得到叔醇而没有可检测到的外消旋化。第二种脒是通过(S)-苹果酸衍生的 N-acyliminium 离子与 β-萘酚偶联获得的。其他脒是从 (S)-丝氨酸衍生的酰亚胺中获得的,该酰亚胺被还原为两种非对映内酰胺,最终转化为相应的脒。