作者:Christian Drescher、Reinhard Brückner
DOI:10.1002/ejoc.202101053
日期:2022.3.7
This work reports the first syntheses of the polyenoyltetramic acids pyranonigrin J (3; N-unsubstituted) and I (4; N-methylated) from the β-ketothioester 18, the stannane 13, and the serine-based building block (S)-19 or the N-Me analog (S)-21, respectively. The specific rotations of our targets and their natural counterparts matched. This supports the absolute configurations of compounds 3 and 4 as
这项工作报告了由 β-酮硫酯18、锡烷13和丝氨酸基结构单元 ( S )- 首次合成聚烯四酸吡喃黑苷 J ( 3 ; N-未取代的) 和 I ( 4 ; N-甲基化的)-分别为19或N - Me 类似物 ( S )- 21。我们的目标与其自然对应物的特定旋转相匹配。这支持了化合物3和4的绝对构型, 如先前从掺入13 C 标记的 ( S)-丝氨酸在生物合成过程中。