Synthetic Communications p. 1 - 6 (2020)
Update date:2022-08-17
Topics:
Yang, Li-Shou
Wang, Yu
Wang, En-Hua
Yang, Jan
Pan, Xiong
Liao, Xiu
Yang, Xiao-Sheng
Coumarins have recently emerged as a hot topic of research due to their diverse pharmacological properties. This work described a method for the synthesis of 3,4-diunsubstituted coumarins promoted by polyphosphoric acid (PPA) from salicylaldehydes and acetic anhydride. Various coumarins were produced in good to excellent yields.
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