Journal of labelled compounds and radiopharmaceuticals p. 369 - 377 (1997)
Update date:2022-09-26
Topics:
Chen, Haitao
Chan, Kenneth K.
Dual C-13 and deuterium labeled perillic acid [(1,1-dideuterio-1-13C-2-methyl)ethenyl]-1-cyclohexene-1-carboxylic acid (6) and deuterated perillyl alcohol, [(2,2-dideuterio-1-methyl)-ethenyl[-1-deuteriohydroxymethyl-1-cyclohexene(9) were synthesized from commercially available (4S)-(-)-perillaldehyde (1). Compound 1 was first protected with ethylene glycol to yield the ethylene ketal followed by oxidation with OsO4/NalO4 to cleave the terminal double bond t afford the key intermediate ketone, 4-acetyl-1-cyclohexene-1-carboxaldehyde ethylene ketal (3). 3 was then converted to the labeled perillyl aldehyde by Wittig reaction with prepared Ph313CD3l or Ph3PCD3l followed by deprotection to give the labeled perillaldehydes, [(2,2-dideuterio-2-13C-1-methyl)-ethenyl]-1-cyclohexene-1-carboxaldehyde (8). 5 was further oxidized by freshly prepared Ag2O to give the desired compound 6. 8 was reduced by LiAID4 to afford the desired compound 9. The same synthetic procedure may be adopted to synthesize the radioactive isotope labeled perillic acid and perillyl alcohol.
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