Synthesis of symmetrical diaryl 1,2-diketones from grignard reagents and 1,1′-Oxalylimidazole
作者:Reginald H. Mitchell、Vivekanantan S. Iyer
DOI:10.1016/s0040-4039(00)79200-8
日期:1993.6
Symmetrical diaryl 1,2-diketones (α-diketones) are obtained in reasonably good yields when readily accessible 1,1′-oxalylimidazole is treated with two equivalents of an aryl Grignardreagent.
Cross-coupling reactions of oxalyl chloride with organocopperreagents, derived fromGrignardreagents, cuprous bromide, and lithium bromide, provide a simple and straightforward method for the synthesis of symmetrical α-diones in very good yields.
Synthesis of Highly Hindered 1,2-Diaryl Diketones and of cis- and trans-1,2-Diacetoxy-1,2-bis(aryl)ethenes
作者:Norma Nudelman、Hernan Schulz
DOI:10.1039/a809045i
日期:——
Highlyhindered 1,2-diaryl diketones can be synthesized in good yields by the reaction of 1-aryllithium with CO in THF solution at atmospheric pressure; preparation of cis- and trans-1,2-diacetoxy-1,2-bis(Mes)ethene can be also afforded by a similar procedure and further quenching with Ac2O.