Synthesis of (NH) m (NMe) 4− m-Bridged Calix [4] pyridines and the Effect of NH Bridge on Structure and Properties

EX Zhang, DX Wang, ZT Huang…

Index: Zhang, En-Xuan; Wang, De-Xian; Huang, Zhi-Tang; Wang, Mei-Xiang Journal of Organic Chemistry, 2009 , vol. 74, # 22 p. 8595 - 8603

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Citation Number: 25

Abstract

The (NH) m (NMe) 4− m-bridged calix [4] pyridines (m= 1− 4) 19− 23 were synthesized in excellent yields from deprotection of N-allyl groups of (NAllyl) m (NMe) 4− m-bridged calix [4] pyridine derivatives 8 and 15− 18, which were prepared in moderate yields by macrocyclic 2+ 2 and 1+ 3 coupling reactions between simple diamino-and dibromo-substituted fragments. In the solid state,(NH) m (NMe) 4− m-bridged calix [4] pyridines adopted ...