An effective self-templating ring closure method for mixed donor thiophene-based macrocycles
作者:Joan Halfpenny、Zachary S. Sloman
DOI:10.1039/b002029j
日期:——
The synthesis via the Mannich reaction of a series of 14- and 15-membered ring mixed donor thiophene-containing macrocycles is reported. The macrocycles each incorporate two oxygen and two nitrogen donor atoms and were obtained in high yields without any requirement for high dilution techniques or metal ion templates. The compounds can be purified by simple recrystallisation. The crystal structure of the 15-membered ring macrocycle C29H32N2O2S2 (4b) has been determined. The structure shows that the bulky benzyl substituents have a major effect on the macrocyclic ring geometry.
Novel thiophene-based macrocycles related to azacrown ethers
作者:John M. Barker、Julie D. E. Chaffin、Joan Halfpenny、Patrick R. Huddleston、Potlaki F. Tseki
DOI:10.1039/c39930001733
日期:——
A range of compounds containing two 3-oxygenated thiophene rings linked through the oxygen atoms by a variety of alkyl and heteroalkyl chains has been prepared and subjected to electrophillic substitution, at C(2) and C(2′), giving, inter alia, bis-Mannich bases containing 14- to 22-membered rings; preliminary X-ray diffraction studies of representative metal complexes are in hand.
The preparation of novel thiophene-based macrocyclic Mannich bases
作者:Julie D. E. Chaffin、John M. Barker、Patrick R. Huddleston
DOI:10.1039/b007661i
日期:——
A range of macrocyclic thiophene-based Mannichbases containing 10–22-membered rings has been prepared. The starting materials for the synthesis were substances of the type ArO–Z–OAr (where Ar = 2-methoxycarbonyl-3-thienyl and Z = alkyl or heteroalkyl), which were made by the reaction of α,ω-dihalides or -bis(toluene-p-sulfonate)s with two moles of methyl 3-hydroxythiophene-2-carboxylate. Saponification
范围大环 噻吩含10–22元环的曼尼希碱基已被制备。合成的起始原料是ArO– Z – OAr类型的物质(其中Ar = 2-甲氧基羰基-3-噻吩基,Z = 烷基或杂烷基),是由α,ω-二卤化物或-双(甲苯-对-磺酸盐)与2摩尔3-羟基噻吩-2-羧酸甲酯。这些化合物的皂化和随后的脱羧得到相应的α,ω-双(3-噻吩氧基)烷烃。由此制备了大环曼尼希碱醚通过氨基甲基化。在许多情况下,以及在杂烷基桥联的情况下,不需要高稀释条件醚,这被认为是由于内部模板效应提高了产量。