A copper-catalyzed system for the amidation of carboxylic acids with tert-amines through C–N bond cleavage was developed. This protocol is practical and represents a simple way to produce functionalized amides from basic starting materials in moderate to good yields. A plausible mechanism is proposed for the reaction.
1,4-Addition of grignard reagents and 1,6-addition of lithium organocuprates to n,n-diethylsorbamide
作者:F Barbot、A Kadib-Elban、Ph Miginiac
DOI:10.1016/s0040-4039(00)94048-6
日期:1983.1
When they react with N,N-diethylsorbamide, saturated and allylic Grignard reagents give γ,δ-ethylenic amides (1,4-addition) whereas saturated and allylic lithiumorganocuprates give β,γ-ethylenic amides (1,6-addition).
Iron-catalyzed δ-selective conjugate addition of methyl and cyclopropyl Grignardreagents to α,β,γ,δ-unsaturated esters and amides took place in good yields to give products exclusively with cis-β,γ-olefinic bond.
Highly Stereoselective Halocyclopropanation of α,β-Unsaturated Amides
作者:José M. Concellón、Humberto Rodríguez-Solla、Elena G. Blanco、María A. Villa-García、Noemí Alvaredo、Santiago García-Granda、M. Rosario Díaz
DOI:10.1002/adsc.200900331
日期:2009.9
A convenient highly stereoselective synthesis of chloro- and bromocyclopropanamides from di- tri- or tetrasubstituted (E)- or (Z)-α,β-unsaturatedamides with total or high stereoselectivity promoted by chromium dichloride or dibromide is described. The transformation of chlorocyclopropanamides into the corresponding ketones or amines is also reported. A mechanism to explain these transformations is
Diencarbonsäureamide aus 1,3-dienen, kohlenmonoxid und sek.-amin an nickel(II)-komplexen
作者:Hans Josef Riegel、Heinz Hoberg
DOI:10.1016/s0022-328x(00)98680-7
日期:1984.1
1,3-Dienes such as butadiene, isoprene or piperylene react with carbon monoxide and secondary amines in the presence of (Et2NH)2NiII-salts to form amides of 2,4-diene carboxylic acids. An example is the formation of CH2CHCHCHCONEt2 (47%) from butadiene. A reaction scheme is suggested.