Synthesis of Epoxyquinol A and Related Molecules: Probing Chemical Reactivity of Epoxyquinol Dimers and 2<i>H</i>-Pyran Precursors
作者:Chaomin Li、John A. Porco
DOI:10.1021/jo050897o
日期:2005.7.1
[4 + 4] dimerization of 2H-pyran epoxyquinol monomers. Modifications of 2H-pyran precursors have been explored, including alteration of epoxy alcohol and diene stereochemistry. A stable 2H-pyran prepared by alteration of the epoxyquinol 2H-pyran nucleus was evaluated as a diene in Diels−Alder cycloaddition with reactive dienophiles. Extensive studies for improving the [4 + 4] dimerization of selectively
使用2 H-吡喃环氧喹啉单体的[4 + 2]和[4 + 4]二聚作用,完成了环氧喹啉二聚体,环氧喹啉A,B和环氧双醇A(RKB-3564 D)的总合成。已经研究了2 H-吡喃前体的修饰,包括环氧醇的改变和二烯的立体化学。通过改变环氧喹诺2 H-吡喃核制备的稳定的2 H-吡喃在Diels-Alder环加成反应性亲二烯体中被评估为二烯。改善选择性保护2 H的[4 + 4]二聚化的广泛研究-吡喃单体可提供新型环氧醌类二聚体环氧双醇A,并获得了关于竞争性[4 + 2]和[4 + 4]二聚过程的宝贵见解。此外,已评估了环氧喹诺尔二聚体的化学反应性和结构修饰,包括[2 + 2]光环加成和[3,3]σ重排,表明有可能从二聚环氧醌类天然产物骨架中产生新的结构多样性。