Results 91 to 100 of about 3,258 (176)

Synthesis of the Southern Tripeptide (C1–N12) of Sanglifehrins Using Asymmetric Organocatalysis [PDF]

open access: yes, 2014
The tripeptide southern region of the novel cyclophilin binding natural product macrolides, namely sanglifehrins, is synthesized involving asymmetric organocatalysis as chirality-inducing step.
Radhika, Laghuvarapu   +1 more
core   +1 more source

Asymmetric Synthesis of 2-Arylethylamines: A Metal-Free Review of the New Millennium

open access: yesMolecules
2-Arylethylamines are presented in several natural bioactive compounds, as well as in nitrogen-containing drugs. Their ability to surpass the blood–brain barrier makes this family of compounds of especial interest in medicinal chemistry.
Alejandro Manchado   +4 more
doaj   +1 more source

Synthesis and use of a stable aminal derived from TsDPEN in asymmetric organocatalysis [PDF]

open access: yes, 2010
A stable aminal formed stereoselectively from (R,R)-N-tosyl-1,2-diphenyl-1,2-ethylenediamine (TsDPEN) is capable of asymmetric organocatalysis of Diels-Alder and alpha-amination reactions of ...
Martin Wills   +7 more
core   +1 more source

Catalytic asymmetric synthesis of biologically important 3-hydroxyoxindoles: an update

open access: yesBeilstein Journal of Organic Chemistry, 2016
Oxindole scaffolds are prevalent in natural products and have been recognized as privileged substructures in new drug discovery. Several oxindole-containing compounds have advanced into clinical trials for the treatment of different diseases. Among these
Bin Yu   +3 more
doaj   +1 more source

(S)- and (R)-5-Pyrrolidin-2-yl-1H-tetrazoles: Enantiomeric Organocatalysts of Broad Utility in Organic Synthesis

open access: yesCHIMIA, 2007
This mini-review concerns the broad application of (S)- and (R)-5-pyrrolidin-2-yl-1H-tetrazoles as organocatalysts. A summary of methods for their synthesis is followed by a discussion of the general reaction mechanism and subsequent analysis of
Deborah A. Longbottom   +2 more
doaj   +1 more source

Meldrum's Acid: A Useful Platform in Asymmetric Organocatalysis [PDF]

open access: yes, 2016
International audienceFor more than a hundred years, Meldrum's acid and its derivatives have proven their utility and versatility in organic synthesis. Showing very unusual properties and multiple facets of reactivity, this small architecture has become ...
Etienne Pair   +7 more
core   +1 more source

Enantioselective synthesis of tricyclic amino acid derivatives based on a rigid 4-azatricyclo[5.2.1.02,6]decane skeleton

open access: yesBeilstein Journal of Organic Chemistry, 2009
An enantioselective route to four tricyclic amino acids and N-tosylamides, composed of a central norbornane framework with a 2-endo,3-endo-annelated pyrrolidine ring and a 5-endo-C1 or -C2 side chain, has been developed. A key intermediate was the chiral,
Matthias Breuning   +6 more
doaj   +1 more source

Diastereoselective Synthesis of (–)-Bestatin, Epibestatin, Phebestin and (3S,4R)-4-Amino-3-hydroxy-5-phenylpentanoic Acid from an Aldehyde Derived from d-Phenylalanine

open access: yesSynOpen, 2019
A convenient and efficient method for the synthesis of (–)-bestatin, epibestatin, phebestin, and (3S,4R)-4-amino-3-hydroxy-5-phenylpentanoic acid is reported. The key step is a proline-catalyzed α-hydroxylation of an aldehyde derived from d-phenylalanine,
Vipin Kumar Jain
doaj   +1 more source

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