Preliminary studies on a novel synthesis of β-amino acids: stereocontrolled transformation of d- and l-glyceraldehyde into 3-amino-2-(2′,2′-dimethyl-1′,3′-dioxolan-4′-yl)propanoic acids
作者:Fernando Fernández、José M. Otero、Juan C. Estévez、Ramón J. Estévez
DOI:10.1016/j.tetasy.2006.11.037
日期:2006.11
stereocontrolled synthesis of the methyl ester of (2S)-3-amino-2-((4′S)-2′,2′-dimethyl-1′,3′-dioxolan-4′-yl)propanoic acid from d-glyceraldehyde is described for the first time. This method involves the stereoselective Michael addition of the lithium salt of tris(phenylthio)methane to (S)-2,2-dimethyl-4-((E)-2-nitrovinyl)-1,3-dioxolane followed by hydrolysis of the resulting (4S)-2,2-dimethyl-4-((2′S)-3′-nitro-1′
立体控制合成(2 S)-3-氨基-2-((4 'S)-2',2'-二甲基-1',3'-二氧戊环-4'-基)丙酸甲酯d-甘油醛是首次被描述。该方法涉及将三(苯硫基)甲烷的锂盐立体选择性地加成到(S)-2,2-二甲基-4-((E)-2-硝基乙烯基)-1,3-二氧戊环中的迈克尔盐,然后将其水解。生成(4 S)-2,2-二甲基-4-((2 'S)-3'-nitro-1',1',1'-三(苯硫基)丙烷-2'-基)-1,3 -二氧戊环成(2 S)-甲基2-((4 'S)-2',2'-二甲基-1',3'-二氧戊环-4'-基)-3-硝基丙酸酯,最终被还原为目标化合物。L-甘油醛类似的立体控制转化为(2 R)-甲基3-氨基-2-((4'R)-2',2'-二甲基-1',3'-二氧戊环-4'-基)丙酸酯也进行了描述。