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Novel ring expansion of cyclopentanones to seven membered rings

โœ Scribed by Masakazu Tanaka; Hiroshi Suemune; Kiyoshi Sakai

Book ID
104217473
Publisher
Elsevier Science
Year
1988
Tongue
French
Weight
246 KB
Volume
29
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

By treatment with BF3/ethyleneglycol, cyclopentanones with the carbonyl function at the C3-position of a-side chain undergo the ring cleavage to build up the seven membered rings, and this novel ring expansion was applied to the synthesis of bulnesol. Recently, we have reported the new type fragmentation reaction, 1) in which cyclopentanones and cyclohexanones with the carbonyl function at-the C3-or

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