potassium hydroxide in liquid ammonia to give tetrasubstituted 18-membered cyclic glycols has been achieved. The cyclic glycols could be converted into 3,9,12,18-tetrasubstituted 1,10-bisdehydro[18]annulenes which were found to be conformationally stable and strongly diatropic.
                                    1,7-二取代-1-oxo-2,4,6-nonatrien-8-ynes 在用
氢氧化钾在液
氨中的悬浮液处理后发生环状二聚反应,得到四取代的 18 元环状二醇。环状二醇可以转化为 3,9,12,18-四取代的 1,10-双脱氢 [18] 环烯,这些环烯被发现具有构象稳定和强互变性。