A divergent and stereoselective approach for the syntheses of (–)-zeylenol, (+)-6-O-benzoylzeylenol, (+)-uvarigranol E and (+)-uvarigranol F
作者:Allam Vinaykumar、Batchu Venkateswara Rao
DOI:10.1016/j.carres.2021.108432
日期:2021.11
divergent, efficient, and stereoselective approach to the total syntheses of four carbasugars, namely, (–)-zeylenol, (+)-6-O-benzoylzeylenol, (+)-uvarigranol E and (+)-uvarigranol F from d-mannose derived key intermediate 14 is described. This intermediate was synthesized using mixed aldol condensation, Grignard reaction and ring closing metathesis as key steps by our previous method in nine steps from d-mannose
一种通用、发散、高效和立体选择性的方法来全合成四种卡巴糖,即 (–)-zeylenol、(+)-6- O-苯甲酰zeylenol、(+)-uvarigraanol E 和 (+)-uvarigraanol F描述了d-甘露糖衍生的关键中间体14 。该中间体是通过我们之前的方法,以混合羟醛缩合、格氏反应和闭环复分解为关键步骤,以d-甘露糖为原料,经过九个步骤合成的。以此中间体为基础,我们实现了(+)-6- O-苯甲酰zeylenol、(+)-uvariganol F的三步合成、(+)-uvariganol E的四步合成,并改进了(–)-zeylenol的合成。