Thienopyridines. Part 4. The Preparation of Some Dithienopyridine Derivatives.
Reaction of 6-ethoxycarbonyl-7-hydroxythienopyridin-5(4H)-one (1) with phosphoryl chloride produced the corresponding 5,7-dichloro- (2) and 7-chloro- (3) derivatives.With alkyl thioglycolate-base these led to angularly fused dithienopyridines; the nature of the products was demonstrated (through reductive dehalogenation) by correlation with dithienopyridines synthesised by an unambiguous route.
Barker, John M.,Huddleston, Patrick R.,Keenan, Guy J.
p. 1726 - 1746
(2007/10/02)
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