(R)- or (S)-4-(3-hydroxy-4,4-dimethyl-2-oxopyrrolidin-1-yl)benzoic acid as a new chiral auxiliary for solid phase asymmetric Diels–Alder reactions
作者:Rhalid Akkari、Monique Calmès、Françoise Escale、Julien Iapichella、Marc Rolland、Jean Martinez
DOI:10.1016/j.tetasy.2004.06.012
日期:2004.8
The synthesis of enantiopure (R)- and (S)-4-(3-hydroxy-4,4-dimethyl-2-oxopyrrolidin-1-yl)benzoic acid is described and the corresponding supported chiral acrylate derivative has been used as a dienophile in solid phase asymmetric Diels–Alder reactions with different dienes. In all cases, the reaction gave the expected compound in good yield and with high regio or endo selectivity. Moreover, a high
描述了对映体纯(R)-和(S)-4-(3-羟基-4,4-二甲基-2-氧吡咯烷-1-基)苯甲酸的合成,并使用了相应的负载型手性丙烯酸酯衍生物不同二烯在固相不对称Diels-Alder反应中的亲双烯体。在所有情况下,反应均以高收率和高区域选择性或内切选择性提供了预期的化合物。此外,使用2,3-二甲基丁二烯,环戊二烯或1,3-环己二烯可获得较高的面部非对映选择性(86-99%de)。相反,异戊二烯观察到低至中等的面部非对映选择性(40-76%de),具体取决于所使用的聚合物。