Results 131 to 140 of about 2,895 (193)

Enantioselective synthesis of α-tetrasubstituted (1-indolizinyl) (diaryl)-methanamines via chiral phosphoric acid catalysis. [PDF]

RSC Adv
Zhong J, Pan R, Lin X.
europepmc   +1 more source

Primary activation of para-quinone methides by chiral phosphoric acid for enantioselective construction of tetraarylmethanes. [PDF]

Chem Sci
Han Z, Zhu B, Zang Y, Zhang C, Dong XQ, Huang H, Sun J.   +6 more
europepmc   +1 more source

Asymmetric Synthesis of Griffipavixanthone Employing a Chiral Phosphoric Acid-Catalyzed Cycloaddition. [PDF]

J Am Chem Soc, 2019
Smith MJ, Reichl KD, Escobar RA, Heavey TJ, Coker DF, Schaus SE, Porco JA.   +6 more
europepmc   +1 more source

General and versatile synthesis of highly recyclable chiral phosphoric acid organocatalysts.

Org Chem Front
Maestro A, Ötvös SB, Auer G, Kappe CO.
europepmc   +1 more source

A robust heterogeneous chiral phosphoric acid enables multi decagram scale production of optically active <i>N</i>,<i>S</i>-ketals.

Green Chem
Maestro A, Malviya BK, Auer G, Ötvös SB, Kappe CO.   +4 more
europepmc   +1 more source

Studies on the Acidities of C₂ Symmetrical Chiral Phosphoric Acids Based on a Decahydroquinoxaline Scaffold. [PDF]

ACS Omega
Gazzotti M, Fumagalli D, Pifferi V, Raimondi L, Rossi S.   +4 more
europepmc   +1 more source

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Chiral phosphoric acids: a chiral lobby for enantioselective C–H activation

Chemical Communications, 2023
Chiral phosphoric acids can interact in different ways with the substrate to induce chirality into the system. This review summarizes the use of chiral phosphoric acids in the exciting field of enantioselective C–H activation.
null Sumit, Devesh Chandra, Upendra Sharma   +2 more
openaire   +2 more sources

Which Is the Actual Catalyst: Chiral Phosphoric Acid or Chiral Calcium Phosphate?

Angewandte Chemie - International Edition, 2010
A highly enantioselective direct Mannich-type reaction of aldimines with a broad range of 1,3-dicarbonyl compounds with the use of a chiral phosphoric acid in the presence or absence of Ca(II) is demonstrated.
Manabu Hatano, Kazuaki Ishihara
exaly   +3 more sources

Reactions of Chiral Phosphorous Acid Diamides

Phosphorus, Sulfur, and Silicon and the Related Elements, 1993
Abstract Chiral phosphorous acid diamides were prepared from chiral C2 diamines via the sequential addition of PCl3 and H2O. Alternatively, addition of PCI3 and hydrogen sulfide yieded the analogous thiophosphorous acid diamides. Deprotonation of the phosphorous acids under a variety of conditions gave the anions which reacted smoothly with alkyl ...
Vincent Blazis, Antonette De La Cruz, Kevin Koeller, Christopher D. Spilling   +3 more
openaire   +1 more source