Remote substituent effects on the stereoselectivity and organocatalytic activity of densely substituted unnatural proline esters in aldol reactions
The organocatalytic activities of highly substituted proline esters obtained through asymmetric [3+2] cycloadditions of azomethine ylides derived from glycine iminoesters have been analyzed by 19F NMR and through kinetic isotope effects. Kineti
De Gracia Retamosa, María,De C?zar, Abel,Sánchez, Mirian,Miranda, José I.,Sansano, José M.,Castell?, Luis M.,Nájera, Carmen,Jiménez, Ana I.,Sayago, Francisco J.,Cativiela, Carlos,Cossío, Fernando P.
Enantioselective Synthesis of exo -4-Nitroprolinates from Nitroalkenes and Azomethine Ylides Catalyzed by Chiral Phosphoramidite·Silver(I) or Copper(II) Complexes
Chiral complexes formed by privileged phosphoramidites derived from chiral binol and optically pure Davies' amines, and copper(II) triflate, silver(I) triflate or silver(I) benzoate are excellent catalysts for the general 1,3-dipolar cycloaddition between
Castelló, Luis M.,Nájera, Carmen,Sansano, José M.,Larra?aga, Olatz,De Cózar, Abel,Cossío, Fernando P.
p. 934 - 943
(2015/03/30)
Efficient diastereo- and enantioselective synthesis of exo-nitroprolinates by 1,3-dipolar cycloadditions catalyzed by Chiral phosphoramidite·silver(I) complexes
Chiral complexes formed by privileged phosphoramidites and silver triflate or silver benzoate are excellent catalysts for the general 1,3-dipolar cycloaddition between azomethine ylides generated from α-amino acid-derived imino esters and nitroalkenes aff
Castell, Luis M.,Njera, Carmen,Sansano, Jos M.,Larraaga, Olatz,De Czar, Abel,Cosso, Fernando P.
supporting information
p. 3861 - 3870
(2015/03/05)
Phosphoramidite-Cu(OTf)2 complexes as chiral catalysts for 1,3-dipolar cycloaddition of iminoesters and nitroalkenes
Chiral complexes formed by phosphoramidites such as (Sa,R,R)-9 and Cu(OTf)2 are excellent catalysts for the general 1,3-dipolar cycloaddition between azomethine ylides and nitroalkenes affording the corresponding tetrasubstituted pro
Castello, Luis M.,Najera, Carmen,Sansano, Jose M.,Larranaga, Olatz,Cozar, Abel De,Cossio, Fernando P.
supporting information
p. 2902 - 2905
(2013/07/26)
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