Green hemi-synthesis of novel thiazole derivatives from Ammodaucus leucotrichus Coss. & Dur. and Cuminum cyminum L. essential oils: stereochemistry, molecular fluorescence spectroscopy, in vitro biologicial activity, and molecular docking study

•New thiazole derivatives from natural product (Ammodaucus leucotrichus and Cuminum cyminum) were hemi-synthesized.•Chemical characterization of the obtained compounds was performed using FTIR, 1D and 2D NMR.•DFT calculation study confirmed the structural stability of the obtained compounds.•New thiazole derivatives exhibited moderate antioxidant activity, while their antibacterial one was much more interesting against some bacterial strains.•Molecular docking study revealed that the new thiazole derivatives can be good candidates to inhibit TNF-α.