Table 2.

One-pot procedure for the synthesis of 1,6-naphthyridin-2(1H)-ones [4]

Entry	Ar1B(OR)2	Time	Ar2B(OR)2	Time/h	Yield/%a
1b		3 h		2	51
2		10 min		3	58
3		10 min		2	55
4		1.25 h		1.5	32
5		1.5 h		3.5	33

^aIsolated yield after purification

^bMonocoupled product was isolated before the second step