✦ LIBER ✦

Vinylketenes from Cyclobutenones by Electrocyclic Ring Opening

✍ Scribed by Dr. Herbert Mayr

Book ID: 101545381
Publisher: John Wiley and Sons
Year: 1975
Tongue: English
Weight: 223 KB
Volume: 14
Category: Article
ISSN: 0044-8249
DOI: 10.1002/anie.197505001

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✦ Synopsis

2,4,4-Trimethyl-2-cyclobutenone ( 9 )

3-Ethoxy-2,4,4-trimethylcyclobutanone (19.0g, 0.1 2mol) in ether (290ml) was mixed to a paste with neutral AI,O, (230g); after 24h the mixture was poured onto a column of dry A1,0, (100g) and eluted with ether (800ml). The solvent was removed by fractional distillation; (9) distilled at 49 to 51 "C/28 torr as a colorless liquid with a pungent odor; yield 10.0 g (75%).

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