. 2005 Feb 28;10(2):481–487. doi: 10.3390/10020481

Table 1.

Influence of solvent on yield in final product ^a

Experiment.	Solvent	Temperature (°C)	Yield (%) ^b
1	DMSO	160-170	35
2	DMF	140-150	27
3	HMPTA	160-170	21
4	NMP	180-190	80

^a) Experiments were performed on the reaction system corresponding to cinnamic acid 3a (see Scheme 1)

^b) After recrystallization