Mg(HSO₄)₂/SiO₂ as a Highly Efficient Catalyst for the Green Preparation of 2-Aryl-1,3-Dioxalanes/Dioxanes and Linear Acetals

Table 1

Optimization of the amounts of Mg (HSO₄)₂/SiO₂ under solvent-free conditions for the reaction of benzaldehyde with ethandiol.

Entry	catalyst amount (g)	Time (min)	Yield (%)^a	Temp. (°C)
1	0.03	120	60	rt
2	0.05	120	75	rt
3	0.1	25	80	rt
4	0.2	5	98	rt
5	0.5	15	95	rt

^aIsolated yields.