Study of the influence of different solvents (20 mL) on the reactions between 6-chloro-3-formylchromone (1 mmol), 2-amino-6-methoxybenzothiazole (1 mmol) and alcohols (2 mmol).

Entry	Alcohol	Solvent	Time	Product	Yield (%)
1	n-Butanol	DCM	12 h	—a	—
2	n-Butanol	THF	4 h	4f	94
3	n-Butanol	DMF	12 h	—b	—
4	n-Butanol	CH3CN	12 h	—b	—
6	1-Octanol	DCMb	10 h	3bic	10
7	1-Octanol	DMF	12 h	—b	—
8	1-Octanol	DMSO	12 h	—b	—
9	1-Octanol	Xylene	12 h	—b	—

^aDifficult to purify.

^bDecomposed.

^cPurified by column chromatography.