Preparation of a New Friedländer Synthon, 2,3‐Diaminobenzene‐1,4‐dicarbaldehyde, and Its Application towards Synthesis of 1,10‐Phenanthrolines and Related Cyclophane
作者:Yang Lu、Yurngdong Jahng
DOI:10.1002/cjoc.201800496
日期:——
A new Friedländer synthon, 2,3‐diaminobenzene‐1,4‐dicarbaldehyde, was prepared from p‐xylene in 4 steps, of which the Friedländer reaction with acetaldehyde and acetone in a Schulenk bottle afforded 1,10‐phenathroline and neocuprine in 44% and 82% yield, respectively. The scope of the Friedländer reactions of 2,3‐diaminobenzene‐1,4‐dicarbaldehyde, including the synthesis of hexaazacyclic cyclophane
由对二甲苯分4步制备了新的Friedländer合成子2,3-二氨基苯-1,4-二甲醛,其中Schülenk瓶中的Friedländer与乙醛和丙酮反应可得到44中的1,10-菲咯啉和新cuprine %和82%的收率分别。描述了2,3-二氨基苯-1,4-二甲醛的弗里德兰德反应的范围,包括具有1,10-菲咯啉和吡啶单元的六氮杂环环烷的合成