Regioselective Thiocyanation of Aromatic and Heteroaromatic Compounds by Using Boron Sulfonic Acid as a New, Efficient, and Cheap Catalyst in Water

Table 1

Solvent effects on the thiocyanation of 1a.

Solvent	Time (h, min)^a	Yield (%)^b
Water	00:05	98
Acetonitrile	01:20	80
Tetrahydrofuran	02:00	73
Dichloromethane	08:00	70
Carbon tetrachloride	12:00	47
Ethanol	00:30	89

^aThe reaction time.
^bIsolated yield of the products after column chromatography.