Regioselective Preparation of 7-Oxanorborna-2,5-diene-2,3-dicarboxylic Acid Derivatives by the Diels-Alder Reaction: A Selective Access to Furans by Retro-Diels-Alder Reaction
作者:Sandrine Deloisy、Nisrine Sultan、Régis Guillot、Luis Blanco
DOI:10.1055/s-0033-1338802
日期:——
1-substituted 7-oxanorborna-2,5-diene-2,3-dicarboxylates occurred regioselectively at the ester group in the 3-position to give monocarboxylic acids from which diesters containing two different alkoxy groups and amido esters were selectively prepared. Hydrogenation of these oxanorbornadiene derivatives followed by a retro-Diels–Alder reaction gave the corresponding furans as single regioisomers. Hydrolysis
摘要 在3-位的酯基上区域选择性地发生1-取代的7-氧杂硼硼烷-2,5-二烯-2,3-二羧酸酯的水解,得到一元羧酸,由此可选择性地制备含有两个不同的烷氧基和酰胺基酯的二酯。这些氧杂降冰片二烯衍生物加氢,然后进行逆Diels-Alder反应,得到相应的呋喃,为单一的区域异构体。 在3-位的酯基上区域选择性地发生1-取代的7-氧杂硼硼烷-2,5-二烯-2,3-二羧酸酯的水解,得到一元羧酸,由此可选择性地制备含有两个不同的烷氧基和酰胺基酯的二酯。这些氧杂降冰片二烯衍生物加氢,然后进行逆Diels-Alder反应,得到相应的呋喃,为单一的区域异构体。