Unravelling the Synthesis and Chemistry of Stable, Acyclic, and Double‐Deficient 1,3‐Butadienes: An
<i>endo</i>
‐Selective Diels–Alder Route to Hedgehog Pathway Inhibitors
The first synthetic access to stable and acyclic 1,3‐butadienes with two electron‐withdrawing carbonylgroups and their potential to deliver new molecular scaffolds through intriguing endo‐selective Diels–Alder cycloadditions are presented. The bicyclic scaffolds produced through the cycloaddition chemistry of electron‐deficient dienes afforded potent Hedgehog signaling pathway inhibitors.
Palladium-Catalyzed Dehydrogenative Carbonylative Esterification of Allenoic Acids for the Synthesis of γ-Butyrolactone Derivatives
作者:Bolin Wang、Mingzhe Ren、Nasir Iqbal、Xin Mu、Jan-E. Bäckvall、Bin Yang
DOI:10.1021/acs.orglett.4c00572
日期:2024.3.29
A highly efficient dehydrogenative carbonylative esterification of allenoic acids using Pd-catalysis was developed, providing a novel approach to synthesizing esterified γ-butyrolactone derivatives with consistently good to excellent results demonstrated across over 50 examples. Additionally, we used a heterogeneous catalyst known as Pd-AmP-MCF and harnessed biomimetic-aerobic-oxidation conditions