An oxidative trimerization of three amino acids has been realized to furnish 2,3,5-trisubstuitued pyridines in both cross- and homo-trimerization types. This method is capable of converting simple linear biomass material to heterocycles, which features in the assembly of three amino acid branched chains into one aromatic ring. Molecular iodine triggers the sequential decarboxylation and deamination
Proline-catalyzed synthesis of α-substituted (<i>E</i>)-α,β-unsaturated aldehydes from epoxides
作者:Ajay Sharma、Satyendra Kumar Pandey
DOI:10.1039/d3ob01750h
日期:——
simple and metal-free tandem approach for synthesizing α-substituted (E)-α,β-unsaturatedaldehyde derivatives through acid-catalyzed epoxide rearrangement and organocatalyzed aldol condensation processes has been described. This transformation has a broad substrate scope under mild conditions, including epoxides and aldehydes containing diverse functional groups, resulting in moderate to high yields
描述了一种新颖、简单且无金属的串联方法,通过酸催化环氧化物重排和有机催化羟醛缩合过程合成α-取代( E )-α,β-不饱和醛衍生物。该转化在温和条件下具有广泛的底物范围,包括含有不同官能团的环氧化物和醛,从而产生中等到高产率的所需产物。最终,大规模反应和一些生物活性分子的合成被用来证明所开发方法的潜在适用性。