The unsaturated bicyclic hydrocarbons of formula
possessing a double bond in one of the positions indicated by the dotted lines (n = zero or 1; R = H or methyl) are prepared from the compounds of formula
(R = H or methyl) by reacting them with a triaryl-pnosphi- ne in the preserce of a metal ha de and cptionally treating the obtained product with an isomenzing agent.
Compounds (I) are useful intermediates in the synthesis of macrocyclic ketones
                            式的不饱和双
环烃,其双键位于虚线所示的一个位置(n = 0 或 1;R = H 或甲基)。
式的不饱和双
环烃,其双键位于虚线所示位置之一(n = 0 或 1;R = H 或甲基)。
(R = H 或甲基)与三芳基膦在
金属ha de 的存在下发生反应,并用异omenzing 剂处理得到的产物。
化合物 (I) 是合成大环酮的有用中间体