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。