作者:Julie D. E. Chaffin、John M. Barker、Patrick R. Huddleston
DOI:10.1039/b200479h
日期:2002.3.8
The preparation of cryptand-like structures, incorporating four thiophene rings, was undertaken. A variety of approaches were considered, but a stepwise process commencing from the readily available α,ω-bis(2-formyl-3-thienyloxy)alkanes of the type ArO-Z-OAr (where Ar = 2-formyl-3-thienyl and Z
= heteroalkyl chain) yielded excellent results. A range of open chain and cyclic Mannich bases incorporating one or two macrorings was prepared via reduction of open chain and macrocyclic imines derived from the heteroalkyl-bridged bisaldehydes. Tosyl and acetyl derivatives of the reduced products, viz. the intermediate secondary amines were prepared; the latter exhibited diastereoisomerism.
研究人员开始制备包含四个噻吩环的类隐结构。研究人员考虑了多种方法,但从易于获得的 ArO-Z-OAr 类型的 α,ω-双(2-甲酰基-3-噻吩氧基)烷烃(其中 Ar = 2-甲酰基-3-噻吩基,Z = 杂烷基链)开始的分步法取得了极佳的效果。通过还原杂烷基桥联二醛衍生的开链和大环亚胺,制备了一系列包含一个或两个大环的开链和环曼尼希碱。制备出了还原产物(即中间仲胺)的对甲苯磺酰基和乙酰基衍生物;后者表现出非对映异构性。