A Novel Access to 2-Aminofuranones via Cyclization of Functionalized γ-Hydroxy-α,β-butenoates Derived from<i>N</i>-Hydroxybenzotriazole Esters of α-Hydroxy Acids
作者:Olga Igglessi- Markopoulou、Giorgos Athanasellis、Anastasia Detsi、Kyriakos Prousis、John Markopoulos
DOI:10.1055/s-2003-41040
日期:——
The reaction between the N-hydroxybenzotriazole esters of substituted glycolic acids and alkyl cyanoacetates or malononitrile leads to the synthesis of γ-hydroxy-functionalized butenoates which are cyclized under mild conditions to the corresponding 2-amino-3,5-disubstituted-4-furanones. That the products are optically active is confirmed by measurements of their optical rotations. On the other hand, replacement of N-hydroxybenzotriazole by N-hydroxysuccinimide might lead to by-products depending on the functionalized glycolic acid used.
取代的羟基苯三唑酯与烷基氰乙酸酯或丙二腈之间的反应导致合成 γ-羟基功能化的丁酸酯,这些丁酸酯在温和条件下环化形成相应的 2-氨基-3,5-二取代-4-呋喃酮。通过测量它们的光旋转,确认了这些产物是光学活性的。另一方面,使用 N-羟基琥珀酰亚胺替代 N-羟基苯三唑可能会导致副产物,具体取决于所使用的功能化羟基乙酸。