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Formation and cleavage of the quinazolinium ring in Vilsmeier-Haack formylation of 4-dialkylamino-substituted naphthalic acid derivatives

✍ Scribed by L. D. Patsenker; I. G. Ermolenko; E. E. Artyukhova; B. M. Krasovitskii

Book ID
105528188
Publisher
Springer US
Year
2000
Tongue
English
Weight
95 KB
Volume
36
Category
Article
ISSN
0009-3122

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Model Construction for the A–B–C Ring System of Lysergic Acid via Vilsmeier–Haack-Type Cyclization of 1H-Indole-4-propanoic Acid Derivatives
✍ Masayuki Kurokawa; Toshiko Watanabe; Tsutomu Ishikawa 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 German ⚖ 192 KB

## Abstract __Vilsmeier–Haack__‐type cyclization of 1__H__‐indole‐4‐propanoic acid derivatives was examined as model construction for the A–B–C ring system of lysergic acid (**1**). Smooth cyclization from the 4 position of 1__H__‐indole to the 3 position was achieved by __Vilsmeier–Haack__ reactio