Results 111 to 120 of about 1,974 (174)

Enantioselective C-H Activations by Metallaelectro-Catalysis. [PDF]

Acc Chem Res
Peters SE, Trienes S, Li Y, Ackermann L.
europepmc   +1 more source

Desymmetrization of Bisallylic Amides: A Catalytic Enantioselective Diastereoselective Chlorocyclization Strategy. [PDF]

Org Lett
Yi Y, Chakraborty A, Ding X, Jaganathan A, Heberer N, Borhan B.   +5 more
europepmc   +1 more source

Enantioselective Synthesis of Axially Chiral Spiro[3.3]heptanes by Site-Selective C-H Functionalization. [PDF]

ACS Catal
Ly D, Chen Z, Musaev DG, Davies HML.
europepmc   +1 more source

Tetrahedral <i>M</i> ^II ₄L₆ (<i>M</i> = Fe, Zn) Cages Equipped with Walls Featuring Antiaromatic Pentalene Motifs. [PDF]

JACS Au
Stawski W, Esser B.
europepmc   +1 more source

Revisiting Stereocontrol through Ligand-Directed Non-Covalent Interactions in the Asymmetric Synthesis of Tetrahydrofuran Cores via Tsuji-Trost Asymmetric Allylic Alkylation. [PDF]

ACS Omega
Casali E, Toma L, Porta A, Zanoni G.
europepmc   +1 more source

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A Desymmetrization-Based Total Synthesis of Reserpine

Angewandte Chemie - International Edition, 2018
AbstractReported herein is a desymmetrization‐based synthetic approach to the fused polycyclic indole alkaloid reserpine. The centerpiece of the developed strategy features an internal desymmetrization process that enabled the use of a readily accessible and nonstereogenic reserpine E‐ring precursor, in contrast to the synthesis‐intensive and ...
David Y-K Chen, Jisook Park
exaly   +3 more sources

Reductive desymmetrization of steroid dimers

Steroids, 2021
NaBH3CN reduction of symmetric dimers in which two steroid units are linked by a 1,4-dimethylidenebenzene moiety followed two different courses: (a) hydrogenation of the benzylic double bond and (b) reductive F ring opening of the side chain. While courses a and b led to symmetrical dimers, the combination of both pathways produced an unsymmetrical ...
Manuel A, Ramos-Enríquez, Margarita, Romero-Ávila, Martín A, Iglesias-Arteaga   +2 more
openaire   +2 more sources

Enantioselective Desymmetrization of Diesters

The Journal of Organic Chemistry, 2014
The desymmetrization of prochiral diesters with a chiral phosphoric acid catalyst to produce highly enantioenriched lactones in excellent yield is reported. The process is easily scaled and accommodates a variety of substitution patterns, many of which result in the generation of an enantioenriched all-carbon quaternary center.
Jennifer, Wilent, Kimberly S, Petersen
openaire   +2 more sources

Desymmetrization of dichloroazaheterocycles

Tetrahedron, 1999
3,6-Dichloropyridizine 1a was converted in good yield into its mono-iodo derivative 1b when treated with a mixture of hydriodic acid and sodium iodide. Pure samples of the mono-iodo derivatives 2b, 3b and 4b could not be obtained from their corresponding dichlorinated precursors with these reagents.
Allan J. Goodman, Stephen P. Stanforth, Brian Tarbit   +2 more
openaire   +1 more source

Enantioselective, Desymmetrizing Bromolactonization of Alkynes

Journal of the American Chemical Society, 2013
Asymmetric bromolactonizations of alkynes are possible using a desymmetrization approach. The commercially available catalyst (DHQD)2PHAL promotes these cyclizations in combination with cheap NBS as a bromine source to give bromoenol lactones in high yield and with high enantioselectivity.
Wilking, Michael, Mueck-Lichtenfeld, Christian, Daniliuc, Constantin G., Hennecke, Ulrich   +3 more
openaire   +3 more sources