Syntheses of dibenzo[b,e][1,4]dioxin derivatives via iron complexes, and further functionalizations via directed metallation
作者:Richard C. Cambie、Sally J. Janssen、Peter S. Rutledge、Paul D. Woodgate
DOI:10.1016/0022-328x(91)86467-5
日期:1991.2
Double nucleophilic aromatic substitution reactions between (cyclopentadienyl)(η6-1,2-dichlorobenzene)iron(1 + ) salts and substituted 1,2benzenediols have been carried out under mild conditions to prepare [η6-dibenzo[b,e][1,4]dioxin]iron(1 + ) complexes functionalized in the 1- or 2-position with an alkyl, aldehyde, carboxylic acid, methoxycarbonyl, carboxamide, or hydroxy group. 3-Methyl- and 4-methyl-(η6-1
之间(环戊二烯基)双亲核芳族取代反应(η 6 -1,2-二氯苯)铁(1 +)盐和取代的1,2benzenediols已在温和的条件下进行的,以制备[η 6 -二苯并[ b,ë ] [在1或2位上被烷基,醛,羧酸,甲氧羰基,羧酰胺或羟基官能化的1,4]二恶英]铁(1 +)配合物。3-甲基-和4-甲基- (η 6用取代的1,2-苯二醇处理-1,2-二氯苯)铁配合物以实现杂环的两个芳环的官能化。通常通过用紫外线照射来释放二苯并二恶英配体。用烷基锂试剂对游离的官能化二苯并二恶英进行直接去质子化,然后用各种亲电试剂淬灭,得到进一步的衍生物,包括两个新的异吲哚酮体系。