Pd/C-catalyzed synthesis of oxamates by oxidative cross double carbonylation of alcohols and tertiary amines through C–N bond cleavage
作者:Yuvraj A. Kolekar、Bhalchandra M. Bhanage
DOI:10.1039/c9nj04156g
日期:——
carbonylation of alcohols and unactivated tertiary amines has been demonstrated. The in situ oxidative C–N bond cleavage of tertiary amines was achieved using molecular oxygen as an environmentally benign oxidant providing a user-friendly approach to the synthesis of oxamates. The developed protocol showed excellent activity towards the cyclic as well as aliphatic tertiary amines and long-chainalcohols. This
The present invention relates to monosubstituted oxalic acid amides of the general formula (I)
[A]+ [O-C(O)-C(O)-X]- (I)
wherein the meaning is for
[A]+ a cation made from an organic moiety A having a formally positively charged heteroatom selected from the group consisting of nitrogen, phosphorus and sulfur and
X is the group -NRaRb, wherein Ra and Rb are the same or different and are independently from each other hydrogen or a C1 to C30 organic residue with the proviso that at least one of Ra and Rb is a C1 to C30 organic residue.
Generation and Reaction of Carbamoyl Anions in Flow: Applications in the Three-Component Synthesis of Functionalized α-Ketoamides
作者:Aiichiro Nagaki、Yusuke Takahashi、Jun-ichi Yoshida
DOI:10.1002/anie.201601386
日期:2016.4.18
microreactor system, carbamoyllithium compounds were successfully generated and used for reactions with electrophiles to give various amides, including α‐ketoamides. The present method could be applied to the three‐component synthesis of functionalized α‐ketoamides using a carbamoyllithium compound, methyl chloroformate, and a functionalized organolithium reagent.
Oxamic acid compounds and pharmaceutical composition for use in
申请人:Meiji Seika Kaisha, Ltd.
公开号:US05232947A1
公开(公告)日:1993-08-03
New N,N-di-alkyl- or alkenyl-substituted derivatives of oxamic acid of which the two alkyl or alkenyl groups are different from each other are now produced and found to exhibit the cerebral protective effect against cerebral anoxia in the brain of a mammalian animal, including human, and to be useful as an agent for improving or ameliorating the damaged or disturbed functions of the brain. Some known N,N-di-alkyl-substituted derivatives of oxamic acid or which the two alkyl groups are identical to each other are now also found to have similar, cerebral protective effect against cerebral anoxia and to be useful as an agent for improving the damaged functions of the brain.
A methylene group was introduced into the C–H bond of α-carbonyl aldonitrones by the reaction with dimethylsulfoxonium methylide, producing one-carbon homologated C-methyl ketonitrones. This formal methylene insertion was applied to one-pot synthesis of quaternary C3-methyl isoxazolidines via successive 1,3-dipolar cycloaddition with alkenes bearing an electron withdrawing group.