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Chiral recognition of cinchona alkaloids at the minor and major grooves of 1,1'-binaphthyl receptors
A variety of chiral 1,1'-binaphthyl derivatives with one or two hydroxyl groups at either the 2,2'-(minor groove) or the 7,7'-positions (major groove) were prepared for enantioselective recognition… Expand
Quinoxaline excision: a novel approach to tri- and diquinoxaline cavitands.
- P. Castro, G. Zhao, Grace A Masangkay, C. Hernández, Linda M. Gutierrez-Tunstad
- Chemistry, Medicine
- Organic letters
- 3 January 2004
[structure: see text] Selective excision of one or two quinoxaline units from tetraquinoxaline cavitand using catechol and base in DMF yields tri- and diquinoxaline cavitands in yields of up to 71%.
Preparation of enantioenriched tetrahydropyridines by iminium ion-vinylsilane cyclizations
Abstract Tetrahydropyridines can be prepared from ( S )-amino acids in high enantiomeric purity as outlined in equation 1.
Chiral 1,1′‐Binaphthyl Molecular Clefts for the Complexation of Excitatory Amino‐Acid Derivatives
- E. Martinborough, T. M. Denti, P. Castro, T. B. Wyman, C. Knobler, F. Diederich
- 9 August 1995
The complexation of N-benzyloxycarbonyl (Cbz) derivatives of the excitatory amino acids L-aspartic acid (Asp; 1), L-glutamic acid (Glu; 3), and, for the first time, L-kainic acid… Expand
Chiral recognition in clefts and cyclophane cavities shaped by the 1,1'-binaphthyl major groove
Le dedoublement optique du dibenzyloxy-7,7' binaphtyl-1,1' diol-2,2' par formation d'un clathrate avec la quinine, est decrit
Hinged molecular capsules: synthesis and conformational control via temperature, pH, or solvent composition.
- S. Kang, P. Castro, G. Zhao, Jose E. Nuñez, Carlos E. Godinez, Linda M. Gutierrez-Tunstad
- Chemistry, Medicine
- The Journal of organic chemistry
- 11 January 2006
Three new covalently linked molecular capsules were synthesized from their resorcinarene cavitand precursors in good yields. The capsules undergo reversible conformational switching between the… Expand
Optically active mono and bis(1,1′-binaphthyl)-cyclophanes: Large differences in the complexation of naproxen derivatives in aqueous solution
Abstract Four new optically active cyclophanes with apolar cavities shaped by the major grooves of the 2,2′, 6,6′- nd 2,2′, 7,7′-tetraoxa-1,1′-binaphthyl units were prepared for the inclusion… Expand
A convenient synthesis of substituted polyether diols
Alkyl-substituted polyether diols (or polythioether diols), which are potential precursors to substituted crown ethers, are produced in high yield by the selective reductive cleavage of C−O bonds in… Expand
SUBSTITUTED DIETHER DIOLS BY RING-OPENING OF CARBOCYCLIC AND STANNYLENE ACETALS
Reduction of malonaldehyde bis(ethylene and propylene acetals) with borane or monochloroborane produces diether diols 1 and 2 in high yield. Similar reduction of glyoxal bis(ethylene acetals) has… Expand