Enantiodivergent one-pot synthesis of axially chiral biaryls was developed using a catalytic amount of a chiral source. A domino organocatalyst-mediated enantioselective Michael/aldol condensation and enantiodivergent central-to-axial chirality conversion afforded chiral biaryls with excellent enantioselectivity in a single reaction vessel. A plausible reaction mechanism for the enantiodivergence was
An Intramolecular Cycloaddition Approach to the Kauranoid Family of Diterpene Metabolites
作者:Brenda Callebaut、Jan Hullaert、Kristof Van Hecke、Johan M. Winne
DOI:10.1021/acs.orglett.8b03810
日期:2019.1.4
Synthetic studies toward the ent-kauranoid family of diterpene natural products are reported. An intramolecular (4 + 3) cycloaddition allows the direct elaboration of diverse natural product frameworks, encompassing a challenging bicyclo[3.2.1]octane core. The established routes comprise only a few synthetic operations (3–5 steps), transforming a range of simple starting materials into the tetracyclic
An efficient and practical one-pot synthesis of isoindolines from readily available starting materials was achieved under mild conditions by implementing an isoindole umpolung strategy. A variety of isoindolines were prepared with good to excellent yields. Biological screens of these identified compounds demonstrated that they are potent potentiators of colistin for multi-drug resistant Acinetobacter
Synthesis of 2-Aryl-1,2-dihydrophthalazines via Reaction of 2-(Bromomethyl)benzaldehydes with Arylhydrazines
作者:Nayyef Aljaar、Jürgen Conrad、Uwe Beifuss
DOI:10.1021/jo302491x
日期:2013.2.1
The reaction of 2-(bromomethyl)benzaldehydes with arylhydrazines employing K2CO3 as a base and FeCl3 as a catalyst in CH3CN at 100 degrees C delivers 2-aryl-1,2-dihydrophthalazines with yields ranging from 60 to 91%. The transformation is considered to proceed as an intermolecular condensation/intramolecular nucleophilic substitution.
METHOD FOR PRODUCING 2-(ARYLOXYMETHYL)BENZALDEHYDE COMPOUND