The Journal of organic chemistry, 74(14), 5041-5048 (2009-06-03)
7-Azabicyclo[2.2.1]heptane-2-carboxylic acid 11 was prepared in enantiopure form, and its catalytic potential in the direct aldol reaction between acetone and 4-nitrobenzaldehyde was assessed. The bicyclic system was found to be more selective than its monocyclic analogue beta-proline 5b. A comparative
The Journal of organic chemistry, 77(23), 10925-10930 (2012-11-07)
A straightforward stereoselective and enantiodivergent cyclization strategy for the construction of γ-lactams is described. The cyclization strategy makes use of chiral malonic esters prepared from enantiomerically enriched monoesters of disubstituted malonic acid. The cyclization occurs with the selective displacement of
Journal of the American Chemical Society, 130(3), 875-886 (2008-01-01)
The development of enantioselective anti-selective Mannich-type reactions of aldehydes and ketones with imines catalyzed by 3-pyrrolidinecarboxylic acid and related pyrrolidine derivatives is reported in detail. Both (3R,5R)-5-methyl-3-pyrrolidinecarboxylic acid and (R)-3-pyrrolidinecarboxylic acid efficiently catalyzed the reactions of aldehydes with alpha-imino esters
Journal of medicinal chemistry, 45(12), 2571-2578 (2002-05-31)
In this paper we describe the synthesis and affinity toward the mu-opioid receptor of some tetrapeptides obtained from endomorphin-1, H-Tyr-Pro-Trp-Phe-NH(2) (1), by substituting each amino acid in turn with its homologue. The ability to bind mu-opioid receptors depends on the
European journal of pharmacology, 469(1-3), 89-95 (2003-06-05)
We previously described a novel endomorphin-1 analogue (Tyr-L-beta-Pro-Trp-Phe-NH(2); Endo1-beta-Pro) more resistant to enzymatic hydrolysis than endomorphin-1 that acts as a mu-opioid receptor agonist. In this study we report that Endo1-beta-Pro, s.c. injected in the mouse, is an effective antinociceptive agent
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