Table 1.

Optimization of microwave-assisted Vilsmayer’s formylation.

Entry	Substrate	Vilsmayer Reagent [equiv.]	T [°C]	t [min] a	Y [%] b
1	1a	1	100	120	49
2	1a	2	100	120	58
3	1a	3	100	80	82
4	1a	3	100	100	88
5	1a	3	120	60	78
6	1a	4	100	90	58
7	1a	19	100	15	51
8	1b	3	100	100	86

^a Monitored using TLC. ^b Isolated yield.