Diastereoselective Synthesis of 3,4-Dihydropyran-3-carboxamides
with in Vitro Anti-inflammatory Activity
Version 2 2019-09-30, 13:38Version 2 2019-09-30, 13:38
Version 1 2019-09-10, 19:47Version 1 2019-09-10, 19:47
Posted on 2019-09-30 - 13:38
A versatile
and economical reaction of diketene (1), aryl amines 2, cyclic 1,3-diketones 3, primary amines 4, and aryl aldehydes 5 was explored to synthesize
3,4-dihydropyran-3-carboxamide derivatives
under mild conditions. Three stereogenic centers are generated in
the products, and the structure of the major diastereomer of 6{1,1,3,1} was identified by X-ray diffraction and 2D NMR
spectroscopy. The scope and limitation investigation provided two
series of (2S,3R,4S)-chromene-3-carboxamides in good to excellent yields with high diastereoselectivity.
Two products, 6{5,3,1,1} and 6{7,3,1,1}, exhibited in vitro anti-inflammatory activity with significant
inhibition of pro-inflammatory cytokine IL-6 and TNF-α expression
in lipopolysaccharide (LPS)-treated Raw 264.7 cells.
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Zeng, Li-Yan; Xi, Baomin; Huang, Kaiqi; Bi, Jingjie; Wei, Lan; Cai, Chun; et al. (2019). Diastereoselective Synthesis of 3,4-Dihydropyran-3-carboxamides
with in Vitro Anti-inflammatory Activity. ACS Publications. Collection. https://doi.org/10.1021/acscombsci.9b00050