Bicyclic Compounds Derived from Tartaric Acid and α-Amino Acids (BTAas): Synthesis of New Molecular Scaffolds Derived from the Combination of (R,R)-Tartaric Acid andL-Serine
作者:Nicoletta Cini、Fabrizio Machetti、Gloria Menchi、Ernesto G. Occhiato、Antonio Guarna
DOI:10.1002/1099-0690(200203)2002:5<873::aid-ejoc873>3.0.co;2-v
日期:2002.3
8-dioxa-3-azabicyclo[3.2.1]octane-6exo-carboxylate (BTS) has been achieved, starting from (R,R)-tartaric acid and O-benzyl-L-serine, in 11% overall yield after 9 steps. Interestingly, starting from the same α-amino acid, it was also possible to prepare the 2endo-substituted compound, formally derived from the combination of tartaric acid with D-serine. Each compound has a CH2OH functional group at C-2, which is
新型 N-Fmoc 保护的二肽异构体甲基 (1S,2S,5S,6R)-2exo-hydroxymethyl-7,8-dioxa-3-azabicyclo[3.2.1]octane-6exo-carboxylate (BTS) 的合成具有从 (R,R)-酒石酸和 O-苄基-L-丝氨酸开始,9 个步骤后总产率为 11%。有趣的是,从相同的 α-氨基酸开始,也可以制备 2endo-取代的化合物,形式上源自酒石酸与 D-丝氨酸的组合。每种化合物在 C-2 处都有一个 CH2OH 官能团,这对于 7,8-二氧杂-3-氮杂双环 [3.2.1] 辛烷-6-羧酸酯 (BTAa) 二肽异构体的多样化非常有用。此外,BTS 中 C-2 甲醇基团的氧化产生了一种新的、构象受限的 α-氨基酸,可用于拟肽合成。