Stereospecific and Stereoselective Reactions. V. Alkylation of Active Methylene Compounds by the Use of Alcohols, Diethyl Azodicarboxylate, and Triphenylphosphine
作者:Toshio Kurihara、Masaru Sugizaki、Itaru Kime、Makoto Wada、Oyo Mitsunobu
DOI:10.1246/bcsj.54.2107
日期:1981.7
alcohols and ethyl cyanoacetate (6) to give alkylated products in 30–80% yields. When ethyl acetoacetate, 1,3-cyclopentanedione, or 1,3-cyclohexanedione was used in place of 6, the corresponding O-alkylated products were obtained. The reaction of either (S)-(−)-ethyl lactate or (S)-(−)-ethyl 2-hydroxy-3-phenylpropionate with 1, 2, and 6, followed by hydrolysis resulted in the formation of (S)-(−)-methylsuccinic
偶氮二甲酸二乙酯 (1) 和三苯基膦 (2) 反应形成的试剂与醇和氰乙酸乙酯 (6) 反应生成烷基化产物,收率 30-80%。当用乙酰乙酸乙酯、1,3-环戊二酮或1,3-环己二酮代替6时,得到相应的O-烷基化产物。(S)-(-)-乳酸乙酯或 (S)-(-)-2-羟基-3-苯基丙酸乙酯与 1、2 和 6 反应,然后水解形成 (S) -(-)-甲基琥珀酸或(S)-(-)-苄基琥珀酸。结果表明,在烷基化步骤中几乎完全反转了构型。