(+/-)-2,3,5-Trichloro-4,4-ethylenedioxycyclopent reacts with Me2CuCNLi2 to give depending on conditions the corresponding 3-methyl substituted cyclopentenone (Ad(N)E adduct) or a mixture of unsaturated acyclic acids formed as the result of abnormal cleavage reaction of C(1)-C(2) bond in the trichorocyclopentenone. Reactions of conjugated 1,4-addition of Me2CuCNLi2 to (+/-)-5-allyl-2,3,5-trichloto-4,4-dimethoxycyclopent 1-one lead to products of replacement of vinylic Cl atom at C(3) by Me group and those of C(5)-dechlorination.
(+/−)-2,3,5-三
氯-4,4-亚乙基二氧
环戊烷与 Me₂CuCNLi₂ 反应,在不同条件下生成相应的 3-甲基取代的
环戊烯酮(Ad(N)E 加成物),或由三
氯环戊烯酮中 C(1)-C(2)键异常断裂反应生成的不饱和
脂肪酸混合物。Me₂CuCNLi₂ 对 (+/−)-5-烯丙基-2,3,5-三
氯-4,4-二甲氧基
环戊酮-1 的共轭 1,4-加成反应,导致 C(3)位的
乙烯基氯原子被甲基取代以及 C(5)位的脱
氯产物生成。