Autoxidation of N-alkylamides. Part I. N-Acylamides as oxidation products
作者:M. V. Lock、B. F. Sagar
DOI:10.1039/j29660000690
日期:——
Products of the thermal and photosensitised autoxidation of N-alkyl- and NN-dialkyl-amides have been identified. N-n-Alkylamides yield principally N-acylamides, primary amides, and N-formylamides, as a result of initial abstraction of a hydrogen atom from the carbon adjacent to nitrogen. Formation of N-formylamides, and of N-acylamides from N-s-alkylamides, involves C(1)–C(2) bond scission in an N-alkyl
on the rate of the photochemical oxidation of a series of N-alkylamides R·CONR′R″ where R and R″ are alkyl groups and R′ is an alkyl group or hydrogen, has been studied. Sodium anthraquinone-2-sulphonate was a powerful photosensitiser. Rates of oxidation and apparent energies of activation are recorded for several amides. A stepwise variation in the rate of oxidation with N-alkyl substituent through
Irreversible inhibition of mammalian and insect peptidylglycine α-hydroxylating monooxygenases (PHMS), peptide amidating enzymes, by N-formyl amides
作者:Michael Klinge、Hengmiao Cheng、T. Mark Zabriskie、John C. Vederas
DOI:10.1039/c39940001379
日期:——
A series of N-formyl amides were synthesized by condensation of N,N-bis(trimethylsilyl)formamide with acid chlorides (59â90% yields), or by reaction of hydroxyglycyl peptides with 90% hydrogen peroxide (45% yield); a number of N-formyl amides which bear a phenyl substituent are mechanis-based irreversible inactivators of peptidylglycine α-hydroxylating monooxygenases purified from pig pituitary and from honeybee heads.
n‐Bu4NI/K2S2O8‐Mediated C–N Coupling between Aldehydes and Amides
作者:Xiaochen Liu、Samual Hee、Netanel G. Sapir、Alvin Li、Syed Farkruzzaman、Jianbo Liu、Yu Chen
DOI:10.1002/ejoc.202400067
日期:——
coupling between aldehydes and amides is reported. When an aromatic aldehyde bears electron-donating groups at either the ortho or para position of the formyl group, a transformylation takes place exclusively. Without these groups, a cross-dehydrogenative coupling dominates. Furthermore, when 2-aminobenzamide is employed, only quinazolin-4(3H)-ones are obtained regardless of the aldehyde used.
据报道,醛和酰胺之间存在n -Bu 4 NI/K 2 S 2 O 8介导的底物依赖性 CN-N 偶联。当芳香醛在甲酰基的邻位或对位带有给电子基团时,仅发生转化酰化。如果没有这些基团,则交叉脱氢偶联占主导地位。此外,当使用2-氨基苯甲酰胺时,无论使用何种醛,都仅获得喹唑啉-4( 3H )-酮。