Synthesis and helical properties of aromatic multilayered oligoureas

…, K Katagiri, I Azumaya, H Kagechika, A Tanatani

Index: Kudo, Mayumi; Katagiri, Kosuke; Azumaya, Isao; Kagechika, Hiroyuki; Tanatani, Aya Tetrahedron, 2012 , vol. 68, # 23 p. 4455 - 4463

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Citation Number: 8

Abstract

Several aromatic multilayered oligoureas with different chain lengths and different numbers of chiral N-substituents were synthesized, and their helical conformation and induced handedness were examined by means of CD spectroscopy. Introduction of one chiral N- substituent is enough to induce handedness, and all the oligoureas examined exist predominantly as helical structures with all-S axial chirality. The hexaureas 6 and 7 had ...