The hydration of beta-carypophyllene in the presence of p-toluenesulfonic a
cid, concentrated sulfuric acid, optically active camphor-10-sulfuric acid
was studied. Better condition was obtained by the method of orthonal design
ing. The result indicates that the stereoselectivity of hydration of beta-c
arypophyllene is almost unaffected by optically active camphor-10-sulfuric
acid.