3-Chloropropenyl alkyl ketones or 2-methoxy-3-chloropropyl alkyl ketones in reaction with ethylenediamine furnish previously unknown 2-alkyl-1-(2-aminoethyl) pyrroles. Their reaction with 2,2'-dichlorodiethyl ether gave rise to 2-alkyl-1-(2-morpholinoethyl)pyrroles, and with anhydrides of dicarboxylic acids the corresponding amidoacids and imides of dicarboxylic acids were obtained.
Mild reduction with silanes and reductive amination of levulinic acid using a simple manganese catalyst
作者:Diego A. Roa、Juventino J. Garcia
DOI:10.1016/j.ica.2020.120167
日期:2021.2
complex [Mn(CO)5Br] was studied for the selective reduction of levulinic acid (LA) to 2-methyl-tetrahydrofuran (MTHF). We further studied the production of pyrrolidines via its reductiveamination using silanes (phenylsilane and tetramethyldisiloxane). The results showed high efficiency and selectivity for this reaction leading to high yields using mild reaction conditions.
Tetrahydropyrrolopyrazine compounds, methods for their preparation, pharmaceutical compositions containing such compounds, and a method of using such compounds for the treatment of pain and other conditions mediated at least partially by Bradykinin 1 receptors (B1R).
Direct Synthesis of Chiral 1,2,3,4-Tetrahydropyrrolo[1,2-<i>a</i>]pyrazines via a Catalytic Asymmetric Intramolecular Aza-Friedel–Crafts Reaction
作者:Yuwei He、Maohui Lin、Zhongmin Li、Xinting Liang、Guilong Li、Jon C. Antilla
DOI:10.1021/ol2018328
日期:2011.9.2
intramolecular aza-Friedel–Craftsreaction of N-aminoethylpyrroles with aldehydes catalyzed by a chiral phosphoric acid represents the first efficient method for the preparation of medicinally interesting chiral 1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazines with high yields and high enantioselectivities. This strategy has been shown to be quite general toward various aldehydes and pyrrole derivatives.
N-氨基乙基吡咯与手性磷酸催化的醛类的直接不对称分子内氮杂-Friedel-Crafts反应代表了制备具有医学意义的手性1,2,3,4-四氢吡咯并[1,2- a ]的第一种有效方法具有高收率和高对映选择性的吡嗪。对于各种醛和吡咯衍生物,该策略已被证明是非常普遍的。
Integration of aerobic oxidation and intramolecular asymmetric aza-Friedel–Crafts reactions with a chiral bifunctional heterogeneous catalyst
A new class of chiral bifunctional heterogeneous materials composed of Au/Pd nanoparticles and chiral phosphoric acids as active orthogonal catalysts was prepared by utilizing a facile pseudo-suspension co-polymerization method. It was found that this heterogeneouscatalyst was capable of facilitating the sequential aerobic oxidation-asymmetric intramolecular aza-Friedel–Crafts reaction between benzyl