Figure 2

The reaction of benzoic acid derivatives with thiophenyl ethanol. (When R = H presents compound 2a, R = 2-OH presents 2b, R = 3-OH presents 2c, and R = 4-OH presents 2d).
The reaction of benzoic acid derivatives with thiophenyl ethanol. (When R = H presents compound 2a, R = 2-OH presents 2b, R = 3-OH presents 2c, and R = 4-OH presents 2d).