Variable Strategy toward Carbasugars and Relatives. 1. Stereocontrolled Synthesis of Pseudo-β-<scp>d</scp>-gulopyranose, Pseudo-β-<scp>d</scp>-xylofuranose, (Pseudo-β-<scp>d</scp>-gulopyranosyl)amine, and (Pseudo-β-<scp>d</scp>-xylofuranosyl)amine
作者:Gloria Rassu、Luciana Auzzas、Luigi Pinna、Lucia Battistini、Franca Zanardi、Lucia Marzocchi、Domenico Acquotti、Giovanni Casiraghi
DOI:10.1021/jo000604l
日期:2000.10.1
"anomeric" amino derivatives, (pseudo-beta-D-gulopyranosyl)amine (1,2,4-tri-epi-validamine) and (pseudo-beta-D-xylofuranosyl)amine. Two sequential, highly diastereoselective carbon-carbon bond-forming maneuvers, i.e., a vinylogous crossed aldol addition and an intramolecular aldolization, proved central to these constructions. The fact that readily available heterocyclic diene scaffolds can be employed in the
由1,2-O-异亚丙基-D-甘油醛合成了四种新颖的手性非外消旋碳糖。基于呋喃和吡咯的2-甲硅烷氧基二烯-分别模拟γ-羟基和γ-氨基丁酸的α,γ-二价阴离子-很好地完成了两种全氧化合物的伪β的合成-D-戊吡喃糖和伪-β-D-木呋喃糖,以及两种“异头”氨基衍生物,(伪-β-D-戊吡喃糖基)胺(1,2,4-三-表-有效胺)和(伪-β- D-二呋喃呋喃糖基)胺。两种连续的,非对映选择性高的碳-碳键形成手法,即乙烯基交联的羟醛加成和分子内羟醛化,被证明对这些结构至关重要。