Carvo-menthone

Carvo-menthol, Carvo-menthone.—Isomeric with menthol and menthone are two other compounds known as carvo-menthol and carvo-menthone. The constitution of these two is proven like the... 

P-Kne = P-Knene Limon = limonene Menth = menthone Puleg = pulegone Carvo = carvone Thym = thymol Carva = carvacrol. 

Menthone was elegantly transposed into carvomenthone by the sequence (196)->(197).439 Piperitol was isomerized into isomenthone over cobalt catalysts.440 Piperitone, p-menth-3-en-2-one, and 8,9-dihydrocarvone can by pyrolysed to aromatics that have lost the Pr group in fair yields (30—50%),441 and menthone can be converted into piperitone and other p-menthen-3-ones via bromination and Zn treatment.442 Pulegone on reaction with HOC1 formed 4-chloro-/>-menth-8-en-3-one,448 and O-acetylated dienolates of pulegone have been prepared.444 Carvo-menthene oxide was isomerized to p-menth-1 (7)-en-2-ol, carvotanacetol, and cyclopentane derivatives over solid acids and bases,445 and 6-thiophenoxy-8,9-... 

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