Experimental results of the continuous flow reaction at different residence time and temperatures^a.

Entry	Temp. (°C)	Res. time (min)	Product (%)
			1	2
1	40	30	3.2	92.2
2	105	30	2.7	89.3
3	105	15	1.4	93.5
4	105	7.5	0.5	96.3
5	65	15	0.3	98.8

^aGeneral reaction conditions: 2.04 M substrate, 0.1 M thiourea, 40–105 °C, 16 mL PFA reactor with 1.0 mm internal diameter and 1.6 mm external diameter.