6-methyl-1,4-dioxospiro[4.5]decane-6-propionic acid methyl ester 、 6-Propyl-1,4-dioxospiro[4.5]decane-6-propionic acid methyl ester 、
2-Oxo-1-propylcyclohexanessigsaeure 以is obtained via the respective intermediates, α,α-diphenyl-6-propyl-1,6-dioxaspiro[4.5]decane-6-propanol, νmaxCHCl3 3620, 3480, 1175, 1130, 1110, 1062 cm-1 , and 2-(3,3-diphenylallyl)-2-propylcyclohexanone, nmr (CDCl3) δ 0.85 (m, 3H), 6.0 (t, 1H), 7.3 (m, 10H)的产率得到