A wide range of oxa[3.n]cyclophanes and homooxacalix[n]arenes is prepared from the corresponding arenedialdehyde via reductive homocoupling reaction in a one-pot fashion. Heterocoupling reaction of arenedialdehyde with bis(trimethylsilyloxymethyl)benzene provides a series of macrocyclic ethers including a new type of oxacalixarene, which consists of the moieties of oxa[3.n]cyclophane and homooxacalix[n]arene; m- or p-phenylene, and 5-substituted 2-methoxy-m-phenylene are tethered by CH2OCH2 linkages. A series of macrocycles are separated with gel permeation chromatography (GPC) and identified with NMR (1H, 13C) and mass (MALDI-TOF) spectra. Their solid-state conformations are elucidated by X-ray crystallographic analyses.
通过还原性均偶联反应,以相应的
戊二烯醛为原料,以一锅法制备出多种氧杂[3.n]环烷和均氧杂[n]烷。醛与双(三甲基
硅氧基甲基)苯的异构偶联反应提供了一系列大
环醚,其中包括一种新型氧杂
喹喔啉,它由氧杂[3.n]环烷和均氧杂
喹喔啉[n]炔的分子组成;间或
对苯二酚和 5-取代的
2-甲氧基间苯二酚通过 CH2OCH2 链接。一系列大环通过凝胶渗透色谱法(
GPC)进行分离,并通过核磁共振(1H、13C)和质谱(MALDI-TOF)进行鉴定。它们的固态构象通过 X 射线晶体学分析得以阐明。