1095607-09-2Relevant academic research and scientific papers
Diastereoselective Synthesis of C2′-Fluorinated Nucleoside Analogues Using an Acyclic Approach
Dostie, Starr,Prévost, Michel,Mochirian, Philippe,Tanveer, Kashif,Andrella, Nicholas,Rostami, Ariana,Tambutet, Guillaume,Guindon, Yvan
, p. 10769 - 10790 (2016)
Nucleoside analogues bearing a fluorine in the C2′-position have been synthesized by SN2-like cyclizations of acyclic thioaminal precursors. This strategy provides access to two scaffolds, d-1′,2′-cis-thiofuranosides and d-1′,2′-trans-furanosides, which are difficult to generate using the standard approach for nucleoside synthesis. The addition of silylated nucleobases onto model C2-fluorinated dithioacetal substrates resulted in 1,2-syn diastereoselectivity, which is consistent with the C2-F and S-alkyl moiety being in close proximity. A new series of analogues bearing a C3′ all-carbon quaternary center along with a C2′-F atom have also been synthesized using this approach and are being investigated as potential antimetabolites.
Enantioselective formation of stereogenic carbon - Fluorine centers by a simple catalytic method
Marigo, Mauro,Fielenbach, Doris,Braunton, Alan,Kjaersgaard, Anne,Jorgensen, Karl Anker
, p. 3703 - 3706 (2005)
(Chemical Equation Presented) An easy protocol has been developed for the formation of stereogenic carbon-fluorine centers by the organocatalytic asymmetric α-fluorination of aldehydes 1. The 2-fluoroaldehydes 4 are formed with 2 as the fluorinating agent
Highly diastereoselective synthesis of enantioenriched: Anti -α-allyl-β-fluoroamines
Chevis, Philip J.,Wangngae, Sirilak,Thaima, Thanaphat,Carroll, Anthony W.,Willis, Anthony C.,Pattarawarapan, Mookda,Pyne, Stephen G.
supporting information, p. 6050 - 6053 (2019/06/03)
A highly diastereoselective synthesis of anti-α-allyl-β-fluoroamines has been developed involving enantioselective α-fluorination of aldehydes followed by a diastereoselective Petasis allyl borono-Mannich reaction. The products are obtained generally in g
Organomediated Enantioselective 18F Fluorination for PET Applications
Buckingham, Faye,Kirjavainen, Anna K.,Forsback, Sarita,Krzyczmonik, Anna,Keller, Thomas,Newington, Ian M.,Glaser, Matthias,Luthra, Sajinder K.,Solin, Olof,Gouverneur, Véronique
supporting information, p. 13366 - 13369 (2015/11/09)
The first organomediated asymmetric 18F fluorination has been accomplished using a chiral imidazolidinone and [18F]N-fluorobenzenesulfonimide. The method provides access to enantioenriched 18F-labeled α-fluoroaldehydes (>90 % ee), which are versatile chiral 18F synthons for the synthesis of radiotracers. The utility of this process is demonstrated with the synthesis of the PET (positron emission tomography) tracer (2S,4S)-4-[18F]fluoroglutamic acid.
Crystallization-induced dynamic resolution of fox chiral auxiliary and application to the diastereoselective electrophilic fluorination of amide enolates
Lubin, Hodney,Dupuis, Christophe,Pytkowicz, Julien,Brigaud, Thierry
, p. 3487 - 3492 (2013/06/26)
A highly efficient crystallization-induced dynamic resolution (CIDR) of trans-Fox (fluorinated oxazolidine) chiral auxiliary is reported. This chiral auxiliary was used for highly diastereoselective (>98% de) electrophilic fluorination of amide enolates. After removal of the chiral auxiliary, highly valuable enantiopure α-fluorocarboxylic acids and β-fluoroalcohols are obtained.
A general, enantioselective synthesis of β- And γ-fluoroamines
O'Reilly, Matthew C.,Lindsley, Craig W.
supporting information, p. 3627 - 3629 (2013/07/11)
In this Letter, we describe a short, high yielding protocol for the enantioselective (87-96% ee) and general synthesis of β-fluoroamines and previously difficult to access γ-fluoroamines from commercial aldehydes via organocatalysis.
Highly diastereoselective and general synthesis of primary β-fluoroamines
Schulte, Michael L.,Lindsley, Craig W.
supporting information; experimental part, p. 5684 - 5687 (2011/12/05)
A short, high yielding protocol has been developed for the highly diastereoselective (dr >20:1) and general synthesis of primary β-fluoroamines by the enantioselective α-fluorination of aldehydes, conversion into the N-sulfinyl aldimine, nucleophilic addi
Rapid, general access to chiral β-fluoroamines and β,β-difluoroamines via organocatalysis
Fadeyi, Olugbeminiyi O.,Lindsley, Craig W.
supporting information; experimental part, p. 943 - 946 (2009/08/07)
A rapid, general route to enantiopure β-fluoroamines and β,β-difluoroamines has been developed employing organocatalysis in both a twopot and a one-pot procedure. Both chemical yields (64-82%) and enantioselectivity (94-98% ee) were excellent and represen
Aldol reactions between L-erythrulose derivatives and chiral α-amino and α-fluoro aldehydes: Competition between felkin-anh and cornforth transition states
Diaz-Oltra, Santiago,Carda, Miguel,Murga, Juan,Falomir, Eva,Marco, J. Alberto
supporting information; scheme or table, p. 9240 - 9254 (2009/09/30)
Both matched and mismatched diastereoselection have been observed in aldol reactions of a boron enolate of a protected L-erythrulose derivative with several chiral α-fluoro and α-amino aldehydes. Strict adherence to the Felkin-Anh model for the respective transition structures does not account satisfactorily for all the observed results, as previously observed in the case of α-oxygenated aldehydes. In some cases, only the Cornforth model provides a good explanation. The factors that influence this dichotomy are discussed and a general mechanistic model is proposed for aldol reactions with α-heteroatom-substituted aldehydes. Additional support for the model was obtained from density functional calculations.
Direct asymmetric α-fluorination of aldehydes
Steiner, Derek D.,Mase, Nobuyuki,Barbas III, Carlos F.
, p. 3706 - 3710 (2007/10/03)
(Chemical Equation Presented) Linear and branched aldehydes are asymmetrically α-fluorinated with L-proline and pyrrolidine-based organocatalysts (see scheme; NFSi: N-fluorobenzenesulfonamide). In the first case, yields and enantioselectivities were high;
