C–H functionalisation of aldehydes using light generated, non-stabilised diazo compounds in flow
作者:Paul Dingwall、Andreas Greb、Lorène N. S. Crespin、Ricardo Labes、Biagia Musio、Jian-Siang Poh、Patrick Pasau、David C. Blakemore、Steven V. Ley
DOI:10.1039/c8cc06202a
日期:——
Here we explore further the use of oxadiazolines, non-stabilised diazo precursors which are bench stable, in direct, non-catalytic, aldehyde C–H functionalisation reactions under UV photolysis in flow and free from additives.
A scalable and efficient method suitable for the preparation of a wide variety of ketones via new intermediate V has been developed.
开发了一种可扩展且高效的方法,适用于通过新的中间体V制备多种酮。
Preparation of Unsymmetrical Ketones from Tosylhydrazones and Aromatic Aldehydes via Formyl C–H Bond Insertion
作者:Daniel M. Allwood、David C. Blakemore、Steven V. Ley
DOI:10.1021/ol5011714
日期:2014.6.6
Preparation of ketones by insertion of diazo compounds into the formyl C–H bond of an aldehyde is an attractive procedure, but use of structurally diverse diazo compounds is hampered by preparation and safety issues. A convenient procedure for the synthesis of unsymmetrical ketonesfrom bench-stable tosylhydrazones and aryl aldehydes is reported. The procedure can be performed in one pot from the parent