[reaction: see text]. A chiral phase-transfer catalyst has been applied to the asymmetric allylation of the tert-butyl glycinate-benzophenone Schiff base with various allylic acetates for the first time to give the allylated products in good yields and with comparable to
The synergistic amplification of the anticonvulsant effects of direct and indirect GABA agonists by glycine has previously been demonstrated. We show in the present report that the anticonvulsant effect of vinyl GABA, a GABA-T (4-aminobutyrate: 2-oxoglutarate aminotransferase) inhibitor with antiepileptic
Cross-linked polystyrene-bound and poly(ethylene glycol)-bound phase-transfer catalysts as well as homopolymers of cinchona alkaloid derivatives have been synthesised. Both soluble and insoluble polymers have been investigated. The enantioselective alkylation of N-diphenyl methylene glycine t-butyl ester has been successfully carried out
Chemical communications (Cambridge, England), 47(5), 1631-1633 (2010-12-01)
An efficient, catalytic, diastereo- and enantioselective conjugate addition of N-(diphenylmethylene)glycine tert-butyl ester to β-aryl substituted enones was realized in the presence of 1 mol% of newly desired dinuclear N-spiro-ammonium salts, affording functionalized α-amino acid derivatives in 57-98% yields with high
Hirudin is the most potent and specific inhibitor of thrombin, a key enzyme in the coagulation process existing in equilibrium between its procoagulant (fast) and anticoagulant (slow) form. In a previous study, we described the solid-phase synthesis of a Trp3
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