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苯并-15-冠-5与四种脂肪族二元酸在多聚磷酸中反应,制备了酮型的二酰双(4＇-苯并-15-冠-5)(1a-d)。后者与Raney镍反应(或用Pd(OH)_2/C催化氢化)和用硼氢化钠还原,分別得到烃型的亚烷基双(4＇-苯并-15-冠-5)(2a-d)和醇型的α,α＇-二羟基亚烷基双(4＇-苯并-15-冠-5)(3a-d)。这是从苯并-15-冠-5制备双(4＇-苯并-15-冠-5)的最简便方法,也可能适用于其它双(4＇-苯并冠醚)的合成。
Benzo-15-crown-5 is reacted with four kinds of aliphatic dibasic acids in polyphosphoric acid to prepare keto-type diacylbis (4’-benzo-15-crown-5) (1a-d). The latter is reacted with Raney nickel (or catalytically hydrogenated with Pd (OH) _2 / C) and reduced with sodium borohydride to give the alkanebis (4’-benzo-15-crown-5) -d) and alcoholic α, α’-dihydroxyalkylenebis (4’-benzo-15-crown-5) (3a-d). This is the easiest way to make bis (4’-benzo-15-crown-5) from benzo-15-crown-5 and may also be suitable for other bis (4’-benzo crown ethers) synthesis.