## Abstract Phenacyl bromide 1 reacts with ethyl cyanoacetate 2 in presence of piperidine catalyst to afford the hexa‐2,4‐diene derivative 5. Ethyl phenacylcyanoacetate 3 was obtained by reaction of 1 with the sodium salt 6. Compound 3 reacts with hydrazines and trichloroacetonitrile to afford the
✦ LIBER ✦
Electrocyclization Reactions of 1-Aza- and 1-Oxapentadienyl and -heptatrienyl Cations: Synthesis of Pyrrole and Furan Derivatives
✍ Scribed by Dirk Alickmann; Roland Fröhlich; Andreas H. Maulitz; Ernst-Ulrich Würthwein
- Book ID
- 102676570
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 558 KB
- Volume
- 2002
- Category
- Article
- ISSN
- 1434-193X
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The title compounds derived from 1, 1-dibromocyclopropanes are transformed into (1) cyclopropyltrimethylsilanes via 1-trimethylsilylcyclopropyllithium species, (2) 1-alkylidenecyclopropanes by the Peterson-olef=tion, and (3) 1-acetyl(or 1-allyl)cyclopropylsilanes with dibutylcopperlithium and acetyl