Perchlorocyclobutenone — a New Synthesis of Four-Membered Rings
✍ Scribed by Dr. G. Maaß
- Publisher
- John Wiley and Sons
- Year
- 1963
- Tongue
- English
- Weight
- 223 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0044-8249
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📜 SIMILAR VOLUMES
## Abstract **A single donor substituent** at each terminus is sufficient to make the CCC skeleton of allenes very flexible and give carbon(0) character to the central carbon atom. This allows the synthesis of a four‐membered carbocyclic allene, which can be doubly protonated and behaves as a very
Scheme 5.2 [2 þ 2] Photocycloaddition induced by photochemical electron transfer.
1. For the preparation of N,N'-dimethylchloroformamidine hydrochloride see reference 111. 2. N,N'-Dimethylchloroformamidine hydrochloride is refluxed for five hours with PC15 (molar ratio 1:l) in cc14. The crude, slightly greenish product crystallizes out o n concentration of the reaction solution.