Aminochromones

Synthesis and Analytical Characterization of Cyclization Products of 3-Propargyloxy-5-benzyloxy-benzoic Acid Methyl Ester

“…Chemicals shifts are expressed in ppm (δ) from tetramethylsilane resonance in the indicated solvents; coupling constants (J-values) are given in Hertz (Hz). 1 H signals are reported in the following order: ppm, multiplicity (s, singlet; d, doublet; t, triplet; q, quartet; m, multiplet), number of protons, and assignments. The APT sequence was used to distinguish methyl and methine signals from those due to methylene and quaternary carbons.…”

“…Chromane is a bicyclic scaffold, ubiquitous in a wide variety of bioactive natural products and synthetic compounds exhibiting antitumor, anti-inflammatory, antiviral, antiprotozoal, and antimicrobial effects [1][2][3][4][5][6][7][8][9][10]. Among them, some have also shown moderate-to-good antitubercular activities [11][12][13][14][15][16][17][18].…”

One‐pot synthesis of polyfunctionalized pyrans catalyzed by basic ionic liquid in aqueous media

“…Furthermore, those compounds can be used as pigments [3], as photoactive materials [4], and as potential biodegradable agrochemicals [5]. Thus, the synthesis of 4H-pyran derivatives currently is of much importance.…”