Poly(4-vinylpyridinium) perchlorate as an efficient solid acid catalyst for the chemoselective preparation of 1,1-diacetates from aldehydes under solvent-free conditions

Poly(4-vinylpyridinium) perchlorate has been used as a supported, recyclable, environmentally-benign catalyst for the formation of acylals from aliphatic and aromatic aldehydes in good to excellent yields under solvent-free conditions. Notably, the reaction conditions were tolerant of ketones. This methodology offers several distinct advantages, including its operational simplicity and high product yield, as well as being green in terms of avoiding the use of toxic catalysts and solvents. Furthermore, the catalyst can be recovered and reused several times without any loss in its activity.

Graphical AbstractPoly(4-vinylpyridinium) perchlorate was used as a catalyst for the acetylation of aliphatic and aromatic aldehydes under solvent-free conditions. Ketones were unaffected by the reaction conditions and the catalyst could be reused several times without any loss in activity.Figure optionsDownload full-size imageDownload as PowerPoint slide