摘要:
Partial ozonolysis of (S)-(-)-limonene in cyclohexane-methanol yields 1-methyl-4-(prop1-en-2-yl)-7,8,9-trioxabicyclo[4.2.1]nonane as a mixture of diastereoisomers at a ratio of 2:3. Nitrogen-containing organic compounds (semicarbazide and hydroxylamine hydrochlorides) favor cyclization of intermediate ozonolysis-reduction products, whereas the reduction with dimethyl sulfide, NaBH4, and NaBH(OAc)(3) follows conventional pattern.