1-Aminocyclopentane-1,2,4-tricarboxylic acids screening on glutamatergic and serotonergic systems
摘要:
Enantiopure constrained 1-aminocyclopentane-1,2,4-tricarboxylic acids containing the glutamic acid skeleton were prepared as two diastereomers characterized by having the carboxylic groups in position two and four cis-oriented to each other and trans with respect to 1-carboxylic group and all cis-oriented carboxylic groups, respectively. A biochemical screening of activity of the above amino acids was investigated on glutamate and 5-HT receptors to find a possible metabotropic agonist, acting on the serotoninergic system. (c) 2007 Elsevier Ltd. All rights reserved.
1-Aminocyclopentane-1,2,4-tricarboxylic acids screening on glutamatergic and serotonergic systems
摘要:
Enantiopure constrained 1-aminocyclopentane-1,2,4-tricarboxylic acids containing the glutamic acid skeleton were prepared as two diastereomers characterized by having the carboxylic groups in position two and four cis-oriented to each other and trans with respect to 1-carboxylic group and all cis-oriented carboxylic groups, respectively. A biochemical screening of activity of the above amino acids was investigated on glutamate and 5-HT receptors to find a possible metabotropic agonist, acting on the serotoninergic system. (c) 2007 Elsevier Ltd. All rights reserved.
Asymmetric synthesis of 2-exo-aminonorbornane-2-endo-carboxylic acid derivatives
作者:Carlos Cativiela、Pilar López、José A. Mayoral
DOI:10.1016/s0957-4166(00)82170-9
日期:1991.1
The Diels-Alder reaction of cyclopentadiene with N-acetyl-alpha,beta-didehydroalaninate of (-)-cis-3-hydroxy isobornyl neopentyl ether yields the corresponding 2-endo(exo)-acetamido-5-norbornene-2-exo(endo)-carboxylates with total diastereofacial selectivity and with a preference for the cycloadduct with the ester group placed at the endo position. So this dienophile is complementary with the previously described (-)-menthyl N-acetyl-alpha,beta-didehydroalaninate for the asymmetric synthesis of 2-aminonorbornane-2-carboxylic acids, since with the latter dienophile exo cycloadducts are preferably obtained with a high diastereofacial selectivity.
Asymmetric synthesis of 2-aminonorbornane-2-carboxylic acids by Diels-Alder reaction
作者:Carlos Cativiela、Pilar López、José A. Mayoral
DOI:10.1016/s0957-4166(00)80027-0
日期:1991.1
The reaction between methyl N-acetyl-alpha,beta-didehydroalaninate and cyclopentadiene in the presence of several chiral Lewis acids is studied and the results obtained are compared with those described for the reactions of the same diene with chiral N-acetyl-alpha,beta-didehydroalaninates. In the presence of the titanium complex 24d methyl (1R, 2R, 4R) 2-acetamido-5-norbornen-2-carboxylate is preferably obtained. Thus, the reaction between methyl N-acetyl-alpha,beta-didehydroalaninate and cyclopentadiene is a good method for the synthesis of (1S, 2R, 4R) 2-aminonorbornane-2-carboxylic acid.
1-Aminocyclopentane-1,2,4-tricarboxylic acids screening on glutamatergic and serotonergic systems
Enantiopure constrained 1-aminocyclopentane-1,2,4-tricarboxylic acids containing the glutamic acid skeleton were prepared as two diastereomers characterized by having the carboxylic groups in position two and four cis-oriented to each other and trans with respect to 1-carboxylic group and all cis-oriented carboxylic groups, respectively. A biochemical screening of activity of the above amino acids was investigated on glutamate and 5-HT receptors to find a possible metabotropic agonist, acting on the serotoninergic system. (c) 2007 Elsevier Ltd. All rights reserved.