Reaction of 3-nitro-and 3-bromo-3-nitroacrylates with sodium azide
摘要:
Reactions of 3-nitro-and 3-bromo-3-nitroacrylates with sodium azide proceed as 1,3-dipolar cycloaddition and lead to the formation of triazolyl-and nitrotriazolylcarboxylates, and also of azido-and azidonitropropenoates.
New phosphino‐oxazoline ligands have been developed, and the ligands have been used for Cu‐catalysed enantioselective conjugate additions to (E)‐nitroalkenes.
已开发出新的膦基-恶唑啉配体,该配体已被用于铜催化的(E)-硝基烯烃的铜对映体选择性共轭加成反应。
Enantioselective synthesis of gabapentin analogues via organocatalytic asymmetric Michael addition of α-branched aldehydes to β-nitroacrylates
Michaeladdition reaction of α-branched aldehydes to β-nitroacrylates was successfully carried out by using a mixed catalyst consisting of a primary amino acid, L-phenylalanine, and its lithium salt to give β-formyl-β′-nitroesters having a quaternary carbon centre in good yields (up to 85%) with high enantioselectivity (up to 98% ee). By using benzyl β-nitroacrylates as Michael acceptors, the obtained
strategies towards potential ligands for the study of binding differences between PhzE, the first enzyme in the biosynthesis of phenazines, and the related enzyme anthranilate synthase. The ligands were designed with the overriding goal to develop new antibiotics via downregulation of phenazinebiosynthesis. Graphical abstract
Regiospecific and Stereoselective Syntheses of (±)-Reserpine and (−)-Reserpine
作者:Gilbert Stork、Peng Cho Tang、Michael Casey、Burton Goodman、Masahiro Toyota
DOI:10.1021/ja055744x
日期:2005.11.23
Full details of three approaches to an entirely regio- and stereoselective synthesis of the well-known target reserpine are described, culminating in a totalsynthesis which efficiently meets these requirements.
Nucleophilic α-addition to β-nitroacrylates: application to the synthesis of α-thioacrylates
作者:Elzbieta Lewandowska
DOI:10.1016/j.tet.2006.03.015
日期:2006.5
The α-addition of alkyl or aryl thionucleophiles to β-nitro-α,β-unsaturated alkenoates in THF in the presence of TEA or DBU gave access to the α-thio-α,β-unsaturated alkenoates. The reaction occurred via formation of β-nitro-α-thioalkanoates and concomitant elimination of nitrous acid from the α-adducts.