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。
Assembly of indenamine derivatives through in situ formed N-sulfonyliminium ion initiated cyclization
A facile access to indene frameworks through condensation of substituted cinnamylaldehydes and sulfonylamines under the catalysis of FeCl3 is reported.
通过FeCl3催化下,报告了通过取代的肉桂醛和磺酰胺的缩合轻松获得茚骨架。
Oxygenation of Simple Olefins through Selective Allylic C−C Bond Cleavage: A Direct Approach to Cinnamyl Aldehydes
allylic C−C σ‐bond cleavage of simple olefins to give valuable cinnamyl aldehydes is reported. 1,2‐Aryl or alkyl migration through allylic C−C bond cleavage occurs in this transformation, which is assisted by an alkyl azide reagent. This method enables O‐atom incorporation into simple unfunctionalized olefins to construct cinnamyl aldehydes. The reaction features simple hydrocarbon substrates, metal‐free