The tricyclic ketone (I; R = H) has been synthesized by a new method, and converted into the bromo-ketone (XVII; R = Br). Favorskii rearrangement of the latter gave methyl (±)-desisopropyldehydroabietate (XX).
三环酮(I; R = H)已通过一种新方法合成,并转化为
溴代
酮(XVII; R = Br)。后者的Favorskii重排得到(±)-去
异丙基脱氢松香酸甲
酯(XX)。