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Photochromic heterocyclic fulgides. Part 4. The thermal and photochemical reactions of (E)-isopropylidene-[?-(2- and -(3-thienyl)ethylidene]succinic anhydrides and related compounds

✍ Scribed by Glaze, Alan P.; Harris, Stuart A.; Heller, Harry G.; Johncock, William; Oliver, Stephen N.; Strydom, Peter J.; Whittall, John


Book ID
117997066
Publisher
Royal Society of Chemistry
Year
1985
Weight
644 KB
Volume
0
Category
Article
ISSN
1472-7781

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✍ Dr. S. M. Abdel-Wahhab (Mrs.); Dr. N. R. El-Rayyes 📂 Article 📅 1971 🏛 John Wiley and Sons 🌐 English ⚖ 360 KB

## Abstract The condensation of 5‐methyl‐thiophen‐2‐aldehyde with dimethyl succinate in the presence of potassium t‐butoxide or sodium hydride gave predominantly (E)‐3‐methoxy‐carbonyl‐4‐(5′‐methyl‐2′‐thienyl)‐but‐3‐enoic acid **1a**, whose configuration is proved by cyclisation with sodium acetate