115186-34-0Relevant academic research and scientific papers
Synthesis of new chiral peptide nucleic acid (PNA) monomers
Falkiewicz,Wisniowski,Kolodziejczyk,Wisniewski
, p. 1393 - 1397 (2001)
We have synthesised a series of new chiral type I peptide nucleic acid monomers in total yields of 36-53%, derived from Val, Ile, Ser(Bzl), Pro, and Trp, employing convenient procedure.
Probing α-Amino Aldehydes as Weakly Acidic Pronucleophiles: Direct Access to Quaternary α-Amino Aldehydes by an Enantioselective Michael Addition Catalyzed by Br?nsted Bases
García-Urricelqui, Ane,de Cózar, Abel,Mielgo, Antonia,Palomo, Claudio
supporting information, p. 2483 - 2492 (2020/12/25)
The high tendency of α-amino aldehydes to undergo 1,2-additions and their relatively low stability under basic conditions have largely prevented their use as pronucleophiles in the realm of asymmetric catalysis, particularly for the production of quaternary α-amino aldehydes. Herein, it is demonstrated that the chemistry of α-amino aldehydes may be expanded beyond these limits by documenting the first direct α-alkylation of α-branched α-amino aldehydes with nitroolefins. The reaction produces densely functionalized products bearing up to two, quaternary and tertiary, vicinal stereocenters with high diastereo- and enantioselectivity. DFT modeling leads to the proposal that intramolecular hydrogen bonding between the NH group and the carbonyl oxygen atom in the starting α-amino aldehyde is key for reaction stereocontrol.
Gold-catalyzed synthesis of enantioenriched furfurylamines from amino acids
Guieu, Benjamin,Le Roch, Myriam,David, Michèle,Gouault, Nicolas
, p. 868 - 875 (2015/08/18)
Abstract A convenient gold-catalyzed asymmetric synthesis of polysubstituted furfurylamines starting from amino acids has been achieved. The cyclization proceeded under mild conditions and generally provided the furan or iodofuran derivatives in good to e
Novel branched isocyanides as useful building blocks in the Passerini-amine deprotection-acyl migration (PADAM) synthesis of potential HIV-1 protease inhibitors
Gravestock, David,Rousseau, Amanda L.,Lourens, Anna C.U.,Hoppe, Heinrich C.,Nkabinde, Lindiwe A.,Bode, Moira L.
scheme or table, p. 3225 - 3229 (2012/07/31)
Novel branched isocyanides have been prepared from l-serine and used as building blocks in the Passerini-amine deprotection-acyl migration (PADAM) sequence for the preparation of compounds with activity against HIV-1 protease.
A simple γ-backbone modification preorganizes peptide nucleic acid into a helical structure
Dragulescu-Andrasi, Anca,Rapireddy, Srinivas,Frezza, Brian M.,Gayathri, Chakicherla,Gil, Roberto R.,Ly, Danith H.
, p. 10258 - 10267 (2007/10/03)
Peptide nucleic acid (PNA) is a synthetic analogue of DNA and RNA, developed more than a decade ago in which the naturally occurring sugar phosphate backbone has been replaced by the N-(2-aminoethyl) glycine units. Unlike DNA or RNA in the unhybridized st
ALKENE MIMICS
-
Page/Page column 25, (2010/10/20)
Ac-Phe-Tyr-phosphoSer-Ψ[CH=C]-Pro-Arg-NH2AND Fmoc-bis(pivaloylmethoxy)phosphoSer-Ψ[CH=C]-Pro-2-aminoethyl-(3-indole); and their Phospho-(D)-serine stereoisomers are novel compounds. Ψ refers to a pseudo amide. Such novel compounds advantageousl
Serine-cis-proline and serine-trans-proline isosteres: Stereoselective synthesis of (Z)- and (E)-alkene mimics by Still-Wittig and Ireland-Claisen rearrangements
Wang, Xiaodong J.,Hart, Scott A.,Xu, Bailing,Mason, Matthew D.,Goodell, John R.,Etzkorn, Felicia A.
, p. 2343 - 2349 (2007/10/03)
Two new amide isosteres of Ser-cis-Pro and Ser-trans-Pro dipeptides were designed and stereo-selectively synthesized to be incorporated into potential inhibitors of the phosphorylation-dependent peptidylprolyl isomerase Pin1, an essential regulator of the
A practical approach to the synthesis of 2,4-disubstituted oxazoles from amino acids
Morwick, Tina,Hrapchak, Matt,DeTuri, Molly,Campbell, Scot
, p. 2665 - 2668 (2007/10/03)
(Matrix presented) A new sequence for the synthesis of various 2,4-disubstituted oxazoles from α-amino acids is reported. The method is shown to be general and incorporates the reagent combination, triphenylphosphine/hexachloroethane, for cyclodehydration of intermediate α-acylamino aldehydes. Implementation of this reagent system for the conversion of α-acylamino ketones to oxazoles is briefly investigated.
Synthesis of densely functionalized pyrrolidinone templates by an intramolecular oxo-Diels-Alder reaction
Murray, William V.,Mishra, Pranab K.,Sun, Sengen,Maden, Amy
, p. 7389 - 7392 (2007/10/03)
Preparation of densely functionalized pyrrolidinone templates, is a challenge for synthetic chemists. These templates are important building blocks for novel conformationally constrained natural products or for library generation of highly functionalized
Solvent-dependent stereoselectivity in a Still-Wittig rearrangement: An experimental and ab initio study
Hart, Scott A.,Trindle, Carl O.,Etzkorn, Felicia A.
, p. 1789 - 1791 (2007/10/03)
(formula presented) The Still-Wittig rearrangement gave opposite selectivities for (Z:E)-alkenes in THF (3:1) vs toluene (1:3) in the synthesis of serine-proline dipeptide amide isosteres. Four transition states leading to (Z)-and (E)-alkenes with THF and
