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Showing 1 to 12 of 288 entries
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Relationship between Platelet PPARs, cAMP Levels, and P-Selectin Expression: Antiplatelet Activity of Natural Products.

Evidence-based complementary and alternative medicine : eCAM

Fuentes E, Palomo I.
PMID: 24324520
Evid Based Complement Alternat Med. 2013;2013:861786. doi: 10.1155/2013/861786. Epub 2013 Nov 13.

Platelets are no longer considered simply as cells participating in thrombosis. In atherosclerosis, platelets are regulators of multiple processes, with the recruitment of inflammatory cells towards the lesion sites, inflammatory mediators release, and regulation of endothelial function. The antiplatelet...

A comparison of screening batteries in the detection of neurocognitive impairment in HIV-infected Spanish speakers.

Neurobehavioral HIV medicine

Levine AJ, Palomo M, Hinkin CH, Valdes-Sueiras M, Lopez E, Mathisen G, Donovan S, Singer EJ.
PMID: 26448691
Neurobehav HIV Med. 2011;3:79-86. doi: 10.2147/NBHIV.S22553.

BACKGROUND: A substantial number of Spanish-speaking individuals from Mexico and Central America are now living in the United States. These individuals are at heightened risk for HIV infection and, due to late diagnosis and limited resources, for HIV-associated neurocognitive...

Bifunctional Brønsted Base Catalyzes Direct Asymmetric Aldol Reaction of α-Keto Amides.

Angewandte Chemie (International ed. in English)

Echave H, López R, Palomo C.
PMID: 26835655
Angew Chem Int Ed Engl. 2016 Mar 01;55(10):3364-8. doi: 10.1002/anie.201510482. Epub 2016 Feb 02.

The first enantioselective direct cross-aldol reaction of α-keto amides with aldehydes, mediated by a bifunctional ureidopeptide-based Brønsted base catalyst, is described. The appropriate combination of a tertiary amine base and an aminal, and urea hydrogen-bond donor groups in the...

Generation of Threonine- and Azathreonine N-Carboxy Anhydrides from alpha-Hydroxy beta-Lactams Promoted by 2,2,6,6-Tetramethylpiperidinyl-1-oxyl (TEMPO) in Combination with Sodium Hypochlorite.

The Journal of organic chemistry

Palomo C, Aizpurua JM, Cuevas C, Urchegui R, Linden A.
PMID: 11667344
J Org Chem. 1996 Jun 26;61(13):4400-4404. doi: 10.1021/jo952178n.

A versatile one-pot oxidation-Baeyer-Villiger reaction sequence applied to alpha-hydroxy beta-lactams and promoted by 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) leads to alpha-amino acid N-carboxy anhydrides. The examples reported constitute the first application of TEMPO in a Baeyer-Villiger reaction and provide a way for...

A chiral acrylate equivalent for metal-free Diels-Alder reactions: endo-2-acryloylisoborneol.

Journal of the American Chemical Society

Palomo C, Oiarbide M, García JM, González A, Lecumberri A, Linden A.
PMID: 12197725
J Am Chem Soc. 2002 Sep 04;124(35):10288-9. doi: 10.1021/ja025906e.

The principle of metal-free activation of enones toward the Diels-Alder reaction with dienes is demonstrated by exploiting the capability of Brønsted acids to activate alpha'-hydroxyenones through hydrogen bonding. The diastereoselective application of such a principle is nicely realized by...

Practical Synthesis of alpha-Amino Acid N-Carboxy Anhydrides of Polyhydroxylated alpha-Amino Acids from beta-Lactam Frameworks. Model Studies toward the Synthesis of Directly Linked Peptidyl Nucleoside Antibiotics.

The Journal of organic chemistry

Palomo C, Oiarbide M, Esnal A, Landa A, Miranda JI, Linden A.
PMID: 11672185
J Org Chem. 1998 Aug 21;63(17):5838-5846. doi: 10.1021/jo980354x.

A straightforward method for the synthesis of polyhydroxylated alpha-amino acid N-carboxy anhydrides (NCAs) is described as the means by which short peptide segments comprised of a polyhydroxylated chain are easily affordable. The entire sequence lies in the preparation of...

Alkylation of chiral alpha-hydroxy ketones derived from (1R)-(+)-camphor. An asymmetric variant of the classical acetylene route to carbonyl compounds.

Organic letters

Palomo C, Oiarbide M, Mielgo A, González A, García JM, Landa C, Lecumberri A, Linden A.
PMID: 11594806
Org Lett. 2001 Oct 18;3(21):3249-52. doi: 10.1021/ol0163530.

[reaction: see text]. The asymmetric version of the traditional route for transforming acetylene into alpha-branched carbonyl compounds is now feasible for the first time. The method involves the temporary attachment of camphor to acetylene and gives a remarkably high...

The aldol addition reaction: an old transformation at constant rebirth.

Chemistry (Weinheim an der Bergstrasse, Germany)

Palomo C, Oiarbide M, García JM.
PMID: 11822463
Chemistry. 2002 Jan 04;8(1):36-44. doi: 10.1002/1521-3765(20020104)8:1<36::aid-chem36>3.0.co;2-l.

The main recent conceptual advances in asymmetric aldol reactions are presented. Methods ranging from stoichiometric chiral auxiliary-mediated to direct, catalytic reactions are covered, including the Mukaiyama aldol reactions which use stoichiometric base and silylating reagents, but catalytic (substoichiometric) amounts...

Developmental capacity of in vitro matured and fertilized oocytes from prepubertal and adult goats.

Theriogenology

Mogas T, Palomo MJ, Izquierdo MD, Paramio MT.
PMID: 16728068
Theriogenology. 1997 Apr 15;47(6):1189-203. doi: 10.1016/s0093-691x(97)00099-x.

The developmental competence of oocytes from prepubertal and adult goats was studied through in vitro maturation, fertilization and embryo culture up to the blastocyst stage. Oocytes were recovered from antral follicles of prepubertal and adult goat ovaries, with or...

Enantioselective aza-Henry reactions assisted by Zn(II) and N-methylephedrine.

Angewandte Chemie (International ed. in English)

Palomo C, Oiarbide M, Halder R, Laso A, López R.
PMID: 16292782
Angew Chem Int Ed Engl. 2005 Dec 16;45(1):117-20. doi: 10.1002/anie.200502674.

No abstract available.

Conjugate addition of nitroalkanes to an acrylate equivalent. Stereocontrol at C-alpha of the nitro group through double catalytic activation.

Organic letters

García JM, Maestro MA, Oiarbide M, Odriozola JM, Razkin J, Palomo C.
PMID: 19663464
Org Lett. 2009 Sep 03;11(17):3826-9. doi: 10.1021/ol901351k.

An unprecedented highly selective direct conjugate addition of prochiral nitroalkanes (R not equal H) to acrylate equivalents is described. The method employs a unique Lewis acid/Brønsted base/MS ternary catalytic system and affords products with dr up to 97/3. With...

Brønsted acid assisted regio- and enantioselective direct O-nitroso aldol reaction catalysed by alpha,alpha-diphenylprolinol trimethylsilyl ether.

Chemistry (Weinheim an der Bergstrasse, Germany)

Mielgo A, Velilla I, Gómez-Bengoa E, Palomo C.
PMID: 20437428
Chemistry. 2010 Jul 05;16(25):7496-502. doi: 10.1002/chem.201000376.

In the presence of p-nitrobenzoic acid, the O-nitroso aldol reaction of nitrosobenzene with enolisable aldehydes may be promoted by commercially available alpha,alpha-diphenylprolinol trimethylsilyl ether. The reaction proceeds with good yields and essentially complete enantioselectivity, with catalyst loadings in the...

Showing 1 to 12 of 288 entries