A. Roy et al., BASE-CATALYZED REARRANGEMENT OF P-MENTH-1-EN-4(8)-OXIDE, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 34(7), 1995, pp. 636-638
p-Menth-1-en-4(8)-oxide (1), a tetrasubstituted spiro epoxide is norma
lly resistant towards bases but under forcing condition with AIP rearr
anges to p-mentha-1,8-dien-4-ol (2). On the other hand, with t-BuOK, p
-mentha-1,3-dien-8-ol (3) and p-mentha-1,4-dien-8-ol (4) are formed as
the major products. These compounds readily get oxidised to p-cymen-8
-ol (5), as seen in the reaction of 1 with N-LiEDA.