Tandem Oxidation Processes: The Direct Conversion of Activated Alcohols into Esters and Amides
作者:Richard J. Taylor、Jonathan S. Foot、Hisashi Kanno、Gerard M. Giblin
DOI:10.1055/s-2002-32951
日期:——
The direct conversion of primary alcohols into methyl esters and amides using manganesedioxide and sodium cyanide with methanol or the appropriate amine is reported. These transformations, which proceed via an in situ four step, double oxidation sequence, have been applied to a range of benzylic, heterocyclic, allylic and propargylic alcohols.
The first zinc-catalyzed oxidativeamidation of benzylalcohols has been developed. Both aliphatic and aromatic amines can be tolerated and applied in this reaction. Various amides were prepared in good yields undersolvent-free and mild conditions.
Esters and Amides from ActivatedAlcohols using Manganese(IV) Dioxide: Tandem Oxidation Processes
作者:Richard J. Taylor、Jonathan S. Foot、Hisashi Kanno、Gerard M. Giblin
DOI:10.1055/s-2003-39163
日期:——
with sodium cyanide in THF-methanol or in methanol alone for the direct conversion of activated alcohols into methyl esters. Ethyl and isopropyl esters can also be prepared. Similarly, use of manganese(IV) dioxide and sodium cyanide in THF containing ammonia or primary amines can be used to convert alcohols into the corresponding amides. Several activated alcohols and one non-activated alcohol example
2,2-Diazido-1,2-diarylethanones: Synthesis and Reactivity with Primary Amines
作者:Kristina Holzschneider、Andreas P. Häring、Stefan F. Kirsch
DOI:10.1002/ejoc.201900292
日期:2019.5.8
The synthesis of 2,2‐diazido‐1,2‐diarylethanones through the direct oxidative azidation of 1,2‐diarylethanones with iodine and sodium azide is described. Reactivity studies revealed the fragmentation of the diazide into amides and nitriles upon treatment with primary amines under basic conditions.
Co2(CO)8 as a convenient in situ CO source for the direct synthesis of benzamides from aryl halides (Br/I) via aminocarbonylation
作者:Poongavanam Baburajan、Kuppanagounder P. Elango
DOI:10.1016/j.tetlet.2013.12.062
日期:2014.1
mild, and functional group tolerant method for the direct synthesis of benzamides fromarylhalides (Br, I) via aminocarbonylation, using solid Co2(CO)8 as a convenient CO source, has been demonstrated. The developed method is applicable to a wide variety of 1° and cyclic and acyclic 2° amines. Nitro substituted (o, m and p) arylhalides have easily been converted to the corresponding benzamides,