cheminform abstract: a chemical evidence of regiochemistry in the diels—alder reaction of...
Post on 06-Jun-2016
Embed Size (px)
1999 fused pyridine derivatives
fused pyridine derivativesR 0450
43 - 143A Chemical Evidence of Regiochemistry in the DielsAlder Re-action of 4-Oxygenated Quinolinequinones with 1-Methoxy-3-trimethylsilyloxy-1,3-butadienes. The DielsAlder reaction of4-oxygenated 6-bromo- and 7-bromoquinolinequinones such as (I) and (IV)proceeds completely regioselectively to yield the corresponding regioisomericazaanthraquinones (III) and (V). These results confirm the regiochemistry inDielsAlder reactions of the corresponding non-halogenated quinolinones ina chemical mean. (HORIGUCHI, YOSHIE; TOMODA, KATSUHIRO;SANO, TAKEHIRO; Heterocycles 51 (1999) 7, 1669-1680; Showa Coll. Pharm.Sci., Machida, Tokyo 194, Japan; EN)