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2005
Fused pyridine derivatives
R 0450
A One-Pot Synthesis of an Anellated [a]Aza-thieno[3,2-g]naphthalenone Through
Transformation Followed by Photocyclization. — Photolysis of pyranones (I)
16- 139 Ring
in the presence of α-oxoketene cyclic aminals (II) and NaH produces the title compounds (III) in moderate yields. The intermediates [cf. (IV)] of the cyclization
can be isolated in the absence of irradiation and independently cyclized (no yields given). — (PRATAP, R.; SHARON, A.; MAULIK, P. R.; RAM*, V. J.; Tetrahedron Lett.
46 (2005) 1, 85-87; Div. Med. Chem., Cent. Drug Res. Inst.,
Lucknow 226 001, India; Eng.) — Mais
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