Results 11 to 20 of about 83,038 (344)

Cyclic Nitriles:  Diastereoselective Alkylations [PDF]

open access: yesThe Journal of Organic Chemistry, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Fraser F, Fleming   +4 more
openaire   +2 more sources

Photocatalyzed Diastereoselective Isomerization of Cinnamyl Chlorides to Cyclopropanes.

open access: yesJournal of the American Chemical Society, 2020
Endergonic isomerizations are thermodynamically unfavored processes that are difficult to realize under thermal conditions. We report a photocatalytic diastereoselective isomerization of acyclic cinnamyl chlorides to strained cyclopropanes.
Bin Xu   +5 more
semanticscholar   +1 more source

Methods for the synthesis of polyhydroxylated piperidines by diastereoselective dihydroxylation: Exploitation in the two-directional synthesis of aza-C-linked disaccharide derivatives [PDF]

open access: yes, 2005
Background: Many polyhydroxylated piperidines are inhibitors of the oligosaccharide processing enzymes, glycosidases and glycosyltransferases. Aza-C-linked disaccharide mimetics are compounds in which saturated polyhydroxylated nitrogen and oxygen ...
Adam Nelson   +8 more
core   +3 more sources

Diastereoselective synthesis of trans-2,3-dihydrofuro[3,2-c]coumarins by MgO nanoparticles under ultrasonic irradiation

open access: yesJournal of Saudi Chemical Society, 2017
MgO nanoparticles have been used as an efficient catalyst for the diastereoselective preparation of trans-2-benzoyl-3-(aryl)-2H-furo[3,2-c]chromen-4(3H)-ones by the multi-component reaction of 2,4′-dibromoacetophenone, pyridine, benzaldehydes and 4 ...
Javad Safaei-Ghomi   +3 more
doaj   +1 more source

Addition of Di(trimethylsilyl) Phosphite to Schiff Bases of 2,5-Diformylfuran [PDF]

open access: yes, 2011
A series of 2,5-Furanyl-bis-(aminomethylphosphonic Acids) has been synthesized by the addition of di(trimethylsilyl) phosphite to azomethine bond of achiral Schiff bases derved from 2,5-diformylfuran.
Ciechańska, Magdalena   +3 more
core   +1 more source

Regio- and Diastereoselective Intermolecular [2+2] Cycloadditions Photocatalyzed by Quantum Dots

open access: yesNature Chemistry, 2019
Light-driven [2+2] cycloaddition is the most direct strategy to build tetrasubstituted cyclobutanes, core components of many lead compounds for drug development.
Yishu Jiang   +4 more
semanticscholar   +1 more source

Bench-Stable Boryl Thianthrenium Dication Enables Aziridinyl Boronate Synthesis via Metal-Free Late-Stage Aziridination with Diverse Nitrogen Nucleophiles. [PDF]

open access: yesAngew Chem Int Ed Engl
A bench‐stable boryl thianthrenium dication is synthesized via thianthrenation of vinyl MIDA boronate. This novel dication enables metal‐free, chemo‐, and diastereoselective late‐stage aziridination with diverse nitrogen nucleophiles. The strategic significance is further showcased by one‐pot electrochemical and asymmetric protocols and versatile ...
Vulupala VR   +7 more
europepmc   +3 more sources

Asymmetric addition of chiral boron-ate complexes to cyclic iminium ions [PDF]

open access: yes, 2014
Boron-ate complexes derived from enantioenriched secondary benzylic boronic esters and aryl lithiums have been reacted with quinolinium, pyridinium and dihydroisoquinolinium salts to give enantioenriched heterocyclic structures with very high ...
Aggarwal, Varinder K.   +4 more
core   +2 more sources

A Concise Total Synthesis of (--)-Maoecrystal Z [PDF]

open access: yes, 2011
The first total synthesis of (--)-maoecrystal Z is described. The key steps of the synthesis include a diastereoselective Ti^(III)-mediated reductive epoxide coupling reaction and a diastereoselective Sm^(II)-mediated reductive cascade cyclization ...
Cha, Jacob Y.   +2 more
core   +2 more sources

Intermolecular diastereoselective annulation of azaarenes into fused N-heterocycles by Ru(II) reductive catalysis

open access: yesNature Communications, 2022
Derivatization of azaarenes can create molecules of biological importance, but reductive functionalization of weakly reactive azaarenes remains a challenge. Here the authors show a dearomative, diastereoselective annulation of azaarenes, via ruthenium(II)
He Zhao   +7 more
doaj   +1 more source

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