Syntheses of (2<i>S</i>,3<i>S</i>)-[4,4,4-<sup>2</sup>H<sub>3</sub>]- and (2<i>S</i>,3<i>R</i>)-[4,4,4-<sup>2</sup>H<sub>3</sub>]Penicillamine
作者:Palaniappagownder Nanjappan、Kondareddiar Ramalingam、Henry I. Mosberg、Ronald W. Woodard
DOI:10.1055/s-1993-25875
日期:——
(2S,3S)-[4,4,4-2H3]- and (2S,3R)-[4,4,4-2H3]Penicillamine (2-amino-3-mercapto-3-methyl-[4,4,4-2H3]butanoic acids) were synthesized from benzyl (1S,3S,6R)-6-(phenoxyacetylamino)penicillanate 1-oxide and allyl (1R,3S,6R)-6-phthalimidopenicillanate 1-oxide, respectively. The two key steps are the stereospecific sulfur oxidation of the 6-phenoxyacetylamino- versus the 6-phthalimidopenicillanic acid to provide the (1S) and (1R) sulfoxides, respectively, and the exclusive exchange of the hydrogen atoms of the C-2 methyl that are cis to oxygen of the sulfoxide group with the deuterium of deuterium oxide.
(2S,3S)-[4,4,4-2H3]和 (2S,3R)-[4,4,4-2H3]青霉胺(2-氨基-3-巯基-3-甲基-[4,4,4-2H3]丁酸)分别由苄基 (1S,3S,6R)-6-(苯氧基乙酰氨基)青霉烷酸 1-氧化物和烯丙基 (1R,3S,6R)-6-邻苯二甲酰亚氨基青霉烷酸 1-氧化物合成。两个关键步骤是 6-苯氧基乙酰氨基青霉烷酸和 6-邻苯二甲酰亚氨基青霉烷酸的立体选择性硫氧化,分别生成 (1S) 和 (1R) 硫氧化物,以及 C-2 甲基氢原子与氧化氘的氘交换,该甲基与硫氧化物基团的氧原子顺式。