Abstract
The palladium (II) catalyzed direct C3-(sp2)-H alkenylation of five membered heterocyclic aldehydes has been developed using 3-aminobutanoic acid as a catalytic transient directing group. A wide range of heterocyclic aldehydes reacted with various acrylates to afford highly site-selective C3 alkenylated products. This method features an exclusive E-selective alkenylation at the C3-position of heterocyclic aldehydes with a broad substrate scope in good to excellent yields. The protocol also gave direct access to few novel compounds that are proved to be mechanochromic luminsescent materials.
Supplementary materials
Title
Transient Directing Group enabled C3-(sp2)-H alkenylation of Five Membered Heterocyclic Aldehydes: An Easy Access to Mechanochromic Luminogens
Description
The Supporting information includes general experimental procedures and details, spectroscopic data, Copies of spectra and single crystal X-ray data.
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