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Abnormal products in the Bischler–Napieralski isoquinoline synthesis

✍ Scribed by Doi, Satoshi; Shirai, Naohiro; Sato, Yoshiro

Book ID
121441033
Publisher
Royal Society of Chemistry
Year
1997
Weight
73 KB
Volume
15
Category
Article
ISSN
1472-7781

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Bischler-napieralski reaction—II : Synth
Bischler-napieralski reaction—II : Synthesis of some ketonic isoquinolines
✍ Nobuo Itoh; Shigehiko Sugasawa 📂 Article 📅 1959 🏛 Elsevier Science 🌐 French ⚖ 52 KB

Ethylene ketals of the type (I) cyclise in presence of phosphorus pentoxide in pyrid& to give the ketal (II) which on hydrolysis yields l-phenyl-6:7-dimethoxy4oxo-3:4-dihydroisquinob (III). 1-(4-oxo-cyclohexyl)-6:7-dimethoxy-3:4-dihydroisoquinoline (Vlll) and 2-oxo-3-methyl-g:1& dimethoxy-I 2:3:4:6: