Three-Component One-Pot Synthesis of Novel Benzo[<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>b</mml:mi></mml:math>]1,8-naphthyridines Catalyzed by Bismuth(III) Chloride : Table 1

]>Three-Component One-Pot Synthesis of Novel Benzo[<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>b</mml:mi></mml:math>]1,8-naphthyridines Catalyzed by Bismuth(III) Chloride : Table 1

Table 1: One-pot synthesis of benzo[b]1,8-naphthyridines.


Entry	R	R₁	R₂		Yield

1	H	H	H	4a	93
2	CH₃	H	H	4b	95
3	OCH₃	H	H	4c	95
4	Cl	H	H	4d	97
5	CH₃	CH₃	H	4e	93
6	H	H	CH₃	4f	95
7	H	H	OCH₃	4g	96
8	H	H	Cl	4h	96

the products were characterised by IR, NMR, and mass spectra.
of isolated products.