Palladium-Catalyzed β-Acyloxylation of Simple Amide via sp3 C–H Activation
摘要:
beta-Acylcoxy amides are prepared in moderate to high yields by palladium-catalyzed acyloxylation of primary sp(3) C-H bonds from simple amides without any special directing group. A catalytic system of Pd(OAc)(2)/CF3CO2H/K2S2O8 is available to various amides with N-substituted by linear alkanes, cyclic alkanes, and electron-deficient benzyl compounds in this reaction. Acyloxylated products could be transformed easily to the corresponding beta-hydroxy amides.
Palladium-Catalyzed β-Acyloxylation of Simple Amide via sp3 C–H Activation
摘要:
beta-Acylcoxy amides are prepared in moderate to high yields by palladium-catalyzed acyloxylation of primary sp(3) C-H bonds from simple amides without any special directing group. A catalytic system of Pd(OAc)(2)/CF3CO2H/K2S2O8 is available to various amides with N-substituted by linear alkanes, cyclic alkanes, and electron-deficient benzyl compounds in this reaction. Acyloxylated products could be transformed easily to the corresponding beta-hydroxy amides.
Palladium-Catalyzed β-Arylation of Amide via Primary sp<sup>3</sup>C–H Activation
作者:Ren Zhao、Wenjun Lu
DOI:10.1021/acs.organomet.8b00325
日期:2018.7.9
A beta-arylation of primary sp(3)C-H bonds on simple amides such as pivalamides with aryl iodides/ CF3CO2Ag has been established successfully at 120 degrees C in a Pd(OAc)(2) (catalyst)/CF3CH2OH (solvent) system. Pivalamides including (BuCONH2)-Bu-t, (BuCONHR)-Bu-t, and (BuCONR2)-Bu-t undergo the arylations smoothly to afford beta-aryl pivalamides in moderate to good yields. Various aryl iodides are available bearing either electron-donating or electron-withdrawing substituted groups in the coupling reactions.
Palladium-Catalyzed β-Mesylation of Simple Amide via Primary sp<sup>3</sup> C–H Activation
作者:Ren Zhao、Wenjun Lu
DOI:10.1021/acs.orglett.7b00536
日期:2017.4.7
A beta-mesylation of primary sp(3) C-H bonds from simple amides with methanesulfonic anhydride; (Ms2O) has been established successfully A 80 degrees C in a Pd(OAc)(2) (catalyst)/K2S2O8 (oxidant)CF3CH2OH (solvent) system. These amide substrates involve N-monosubstituted linear,, branch, or cyclic alkanes, and electron-deficient benzyl compounds. The beta-mesylated amide products can be converted easily to beta-fluoroamideS or beta-lactams through inter- or intramolecular S(N)2 processes.
Palladium-Catalyzed β-Acyloxylation of Simple Amide <i>via</i> sp<sup>3</sup> C–H Activation
作者:Lihong Zhou、Wenjun Lu
DOI:10.1021/ol403393w
日期:2014.1.17
beta-Acylcoxy amides are prepared in moderate to high yields by palladium-catalyzed acyloxylation of primary sp(3) C-H bonds from simple amides without any special directing group. A catalytic system of Pd(OAc)(2)/CF3CO2H/K2S2O8 is available to various amides with N-substituted by linear alkanes, cyclic alkanes, and electron-deficient benzyl compounds in this reaction. Acyloxylated products could be transformed easily to the corresponding beta-hydroxy amides.