A new carbamoylation of tertiaryamines is reported. This rare C-H transformation features the direct generation of alpha-aminoalkyl radicals from tertiaryamines, followed by the addition of the resultant nucleophilic radicals to isocyanates, enabling unique access to N,N-dialkylated amino acid derivatives. The authors put forward a mechanistic proposal that is based on the isolation of borinamides
Nickel-Catalyzed Amide Bond Formation from Methyl Esters
作者:Taoufik Ben Halima、Jeanne Masson-Makdissi、Stephen G. Newman
DOI:10.1002/anie.201808560
日期:2018.9.24
reactions, the synthesis of amide bonds is accomplished primarily by wasteful methods that proceed by stoichiometric activation of one of the starting materials. We report a nickel‐catalyzed procedure that can enable diverse amides to be synthesized from abundant methylester starting materials, producing only volatile alcohol as a stoichiometric waste product. In contrast to acid‐ and base‐mediated amidations
The present invention provides engineered carboxyesterase enzymes having improved properties as compared to a naturally occurring wild-type carboxyesterase enzymes, as well as polynucleotides encoding the engineered carboxyesterase enzymes, host cells capable of expressing the engineered carboxyesterase enzymes, and methods of using the engineered carboxyesterase enzymes in amidation reactions.
Provided are a resin composition including a colorant and a resin, in which the colorant contains two or more squarylium colorants represented by Formula (1) below, at least one of the squarylium colorants is a squarylium colorant having a hydrogen-bonding group, which is represented by Formula (2) below, and a colorant mixture consisting of the two or more squarylium colorants, which is included in the resin composition, has a maximum absorption wavelength in a wavelength range of 400 nm to 700 nm; an optical filter; a liquid crystal display device; a solid-state imaging element; and a colorant mixture.
Antineoplastic agents. XIX. <i>N</i>-Bis(2-haloethyl)glycine amides
作者:George R. Pettit、Maurice R. Chamberland、Brian Green
DOI:10.1139/v67-252
日期:1967.7.1
A number of routes to N-bis(2-fluoroethyl)glycine (IIIa) were explored. Of these, condensation between N-bis(2-fluoroethyl)amine and bromoacetic acid in tetrahydrofuran proved to be the most satisf...