作者:George R. Newkome、Charles R. Marston
DOI:10.1016/s0040-4020(01)91918-0
日期:1983.1
2, 6-Bis (bromomethyl)nicotinic oxazoline 15, prepared from ethyl 2,6-dimethylnicotinate, was converted into the 1:1-macrocyclic oxazolines 19 and 22 as well as the isomeric macrocyclic dimers 20. Ethyl 2, 6-bis(bromomethyl)nicotinate 23, prepared from 6b, was converted to the corresponding 1:1-dibenzo-18-crown-6 macrocyclic analog 24. NMR and mass spectral data were used to ascertain the macrocyclic
2,6-双(溴甲基)烟酸恶唑啉15,由乙基2,6- dimethylnicotinate制备,转化为1:1的大环恶唑啉19和22以及同分异构的大环二聚物20。由6b制备的乙基2,6-双(溴甲基)烟酸酯23,转化为相应的1:1-dibenzo-18-crown-6大环类似物24。NMR和质谱数据用于确定大环结构。氧化后,22与EtMgBr反应,得到4-取代的吡啶基大环化合物26高产。然而,在相同条件下,非-恶唑啉大环27被回收在TOTO。