A straightforward synthesis of DAH (3-deoxy-D-arabino-hept-2-ulosonic acid) and DRH (3-deoxy-D-ribo-hept-2-ulosonic acid)
作者:Ke-Gang Liu、Shou-Gang Hu、Yikang Wu、Zhu-Jun Yao、Yu-Lin Wu
DOI:10.1039/b205047a
日期:2002.8.8
Based on the oxidation of corresponding terminal alkynes to α-keto esters, DAH (3-deoxy-D-arabino-hept-2-ulosonic acid) in its pyranose form and DRH (3-deoxy-D-ribo-hept-2-ulosonic acid) in its protected pyranose–furanose mixture form were efficiently synthesized. These terminal alkynes were in turn obtained by C1- or C3-homologation of corresponding protected sugars, respectively. Along with the application of this strategy, the syntheses of two C6-ulosonic acids, 3-deoxy-D-erythro-hex-2-ulosonic acid and 3-deoxy-L-erythro-hex-2-ulosonic acid in their protected pyranose form, were also described.
基于相应末端炔烃氧化为α-酮酯,成功合成了其吡喃糖形式的DAH(3-脱氧-D-阿拉伯庚-2-尤洛糖酸)和其受保护的吡喃糖-呋喃糖混合形式的DRH(3-脱氧-D-核糖庚-2-尤洛糖酸)。这些末端炔烃则分别通过相应受保护糖的C1或C3同系物化获得。随着这一策略的应用,还描述了两种C6尤洛糖酸的合成,即其受保护的吡喃糖形式的3-脱氧-D-红藓庚-2-尤洛糖酸和3-脱氧-L-红藓庚-2-尤洛糖酸。