iodine-mediated oxidative annulation of aryl acetylenes-arylethenes-aromatic ketones with 1,2-diamines for the synthesis of pyrazines and regioselective synthesis of quinoxalines is presented. A multipathway coupled domino approach has been developed for the one-pot synthesis of 1,4-diazines with high functional group compatibility.
Copper-Assisted Synthesis of 2-Hydroxyphenyl-1,2-diones from Phenols and 2-Oxoaldehydes
作者:Narsaiah Battini、Satyanarayana Battula、Qazi Naveed Ahmed
DOI:10.1002/ejoc.201501423
日期:2016.2
An efficient copper(II)‐catalyzed protocol for the ortho‐functionalization of phenols is developed. This method tolerates a wide variety of 2‐oxoaldehydes and phenols and affords the corresponding 2‐hydroxyphenyl‐1,2‐diones in appreciable yields.
An I-2/KOH synergistically promoted direct ring-opening aroylation of benzothiazoles with aryl ketones has been discovered. Aryl ketones were seen to act as carbonyl sources to construct 2-acylbenzothiazoles. This reaction could provide an example for the convergent integration of self-labor domino sequences based on an in situ cross-trapping strategy.
Imidazole Catalysis. II. The Reaction of Substituted Imidazoles with Phenyl Acetates in Aqueous Solution
作者:Thomas C. Bruice、Gaston L. Schmir
DOI:10.1021/ja01534a040
日期:1958.1
681. The structures of some supposed azetid-2 : 4-diones. Part II. Derivatives of tartronic acid