作者:Manfred Michalik、Klaus Peseke、Ahmed Bari、Selena Milicevic、Holger Feist、Dirk Michalik
DOI:10.1055/s-2005-872095
日期:——
2-Formyl-d-xylal (1a) and 2-formyl-l-arabinal (1b) were reacted with alkyl cyanoacetates to furnish the 1,5-anhydro-3,4-di-O-benzyl-2-[(E)-2-cyano-2-alkoxycarbonylvinyl]-2-deoxy-d(l)-hex-1-enitols 2a and 2b, respectively. Treatment of 2a, 2b with aromatic amines afforded the 1-aryl-5-[1,2-bis(benzyloxy)-3-hydroxypropyl]-1,2-dihydro-2-oxopyridine-3-carbonitriles 3a-c. Ring transformation of 1a, 1b with N-substituted oxobutyramides, dialkyl 3-oxopentanedioate and benzimidazol-2-ylacetonitrile yielded the 3-acetyl-1-aryl-5-[1,2-bis(benzyloxy)-3-hydroxypropyl]-1,2-dihydropyridin-2-ones 6a-d, alkyl 5-[1,2-bis(benzyloxy)-3-hydroxypropyl]-2-hydroxyisophthalates 8a-d and 2-[1,2-bis(benzyloxy)-3-hydroxypropyl]benzo[4,5]imidazo-[1,2-a]-pyridine-4-carbonitriles 11a, 11b, respectively.
2-甲酰基-d-木糖醛 (1a) 和 2-甲酰基-l-阿拉伯糖醛 (1b) 与烷基氰基乙酸酯反应,分别得到 1,5-脱水-3,4-二-O-苄基-2-[(E)-2-氰基-2-烷氧羰基乙烯基]-2-脱氧-d-(l-)己-1-烯醇 2a 和 2b。用芳香胺处理 2a、2b,得到 1-芳基-5-[1,2-双(苄氧基)-3-羟基丙基]-1,2-二氢-2-氧代吡啶-3-氰基 3a-c。1a, 1b 与 N-取代的氧代丁酰胺、二烷基 3-氧代戊二酸酯和苯并咪唑-2-基乙腈进行环变换反应,分别得到 3-乙酰基-1-芳基-5-[1,2-双(苄氧基)-3-羟基丙基]-1,2-二氢吡啶-2-酮 6a-d、烷基 5-[1,2-双(苄氧基)-3-羟基丙基]-2-羟基异酞酸酯 8a-d 和 2-[1,2-双(苄氧基)-3-羟基丙基]苯并[4,5]咪唑并-[1,2-a]吡啶-4-氰基 11a, 11b。