Alkylation, Homologation, and Related Processes

Perilla aldehyde underwent the Wittig reaction,396 and also reacted with 1-methoxy-l-thiophenoxycyclopropane to give (186).397 The 5,6-epoxide of carvone 

Selected from numerous other, apparently randomly studied, reactions are carboxylation of menthol or menth-l-ene at C-l, C-3, C-4, and C-8 on treatment with C0-BF3-C1CH2C02H,412 coupling of limonene at C-2 and C-4 to xylenols in the presence of Amberlite IR-120 resin,413 dimerization (C-3 to C-3 linkage) of carvone induced by FeCl3,414 and the aromatization observed in the BF3-catalysed reaction of terpinolene and tetrahydrogeraniol to give cymen-8-yl tetrahydrogeranyl ether.415 

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