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Table 2 Optimization mol % of DABCO during the synthesis 9a

From: Organocatalysis in heterocyclic synthesis: DABCO as a mild and efficient catalytic system for the synthesis of a novel class of quinazoline, thiazolo [3,2-a]quinazoline and thiazolo[2,3-b] quinazoline derivatives

Entry a mol % of DABCO Yield (%)
1 5 75
2 10 81
3 15 73
4 20 70
5 30 62
6 40 54
7 50 46
8 60 45
9 70 45