Preparation
Obtained from resorcinol by a typical Friedel– Crafts reaction (40%)
, ? with acetic acid in the presence of boron trifluoride,
– at 140° for 3 h in a sealed tube (30%)
; – at 125° for 6 h (20%)
; ? with acetic anhydride,
– in the presence of concentrated sulfuric acid at 130° for 15 min (15%)
; – in the presence of zinc chloride at 145–150° (7%) or at 150–160° for 20 min (6%)
; ? with acetyl chloride,
– by heating in the presence of concentrated sulfuric acid (10%)
; – in ethyl ether in the presence of aluminium chloride at r.t. for 3 days (7%).
