Solid phase synthesis of hydantoins using a carbamate linker and a novel cyclization/cleavage step

BA Dressman, LA Spangle, SW Kaldor - Tetrahedron Letters, 1996 - Elsevier
An 800 compound hydantoin library has been constructed using a diverse set of 20 amino
acids and over 80 primary amines. Amino acids were attached via their N-termini to …

Isolation and structure elucidation of the major degradation products of cefaclor in the solid state

…, LJ Lorenz, JL Occolowitz, LA Spangle… - Journal of …, 1997 - Elsevier
Cefaclor is a β-lactam antibiotic that degrades slowly under normal storage conditions to
several minor products. To obtain samples large enough to permit structure elucidation, …

Evaluation of the major metabolites of raloxifene as modulators of tissue selectivity

…, S Cho, LL Short, M Sato, NN Yang, LA Spangle… - The Journal of steroid …, 1997 - Elsevier
Raloxifene (LY139481 HCl) is a selective estrogen receptor modulator (SERM) which blocks
the effects of estrogen on some tissues, such as the breast and uterus, while mimicking …

Synthesis of the four isomers of 4-aminopyrrolidine-2, 4-dicarboxylate: identification of a potent, highly selective, and systemically-active agonist for metabotropic …

…, T Howe, A Bond, D Lodge, LA Spangle… - Journal of medicinal …, 1996 - ACS Publications
The four isomers of 4-aminopyrrolidine-2,4-dicarboxylate (APDC) were prepared and evaluated
for their effects at glutamate receptors in vitro. (2R,4R)-APDC (2a), an aza analog of the …

Metabolism and disposition of the antifolate LY231514 in mice and dogs

…, DE Dorman, JM Gruber, C Shih, LA Spangle… - Drug metabolism and …, 1997 - ASPET
The metabolism and disposition of LY231514 was studied in mice and dogs. LY231514 is a
novel pyrrolopyrimidine-based multi-target antifolate (MTA) showing broad in vivo antitumor …

Isolation and structure elucidation of the major degradation products of cefaclor formed under aqueous acidic conditions

…, JL Occolowitz, MW Collins, LA Spangle… - Journal of …, 1997 - Wiley Online Library
The aqueous acidic degradation of the oral cephalosporin cefaclor was investigated. A number
of degradation products were isolated and characterized. The degradation products can …

Isolation and structure elucidation of a novel product of the acidic degradation of cefaclor

…, DE Dorman, JL Occolowitz, LA Spangle… - Journal of …, 1993 - Elsevier
The acidic aqueous degradation of cefaclor, an orally administered cephalosporin antibiotic,
has been investigated. The most prominent peak in the high-performance liquid …

In vitro biotransformation and identification of human cytochrome P450 isozyme-dependent metabolism of tazofelone

SS Surapaneni, MP Clay, LA Spangle… - Drug metabolism and …, 1997 - ASPET
Tazofelone is a new inflammatory bowel disease agent. The biotransformation of tazofelone
in human livers and the cytochrome P450 responsible for the biotransformation has been …

Chemistry of cephalosporin antibiotics. Part XVI. Configurational and conformational analysis of deacetoxy-Δ 2-and-Δ 3-cephalosporins and their corresponding …

…, PV Demarco, CF Murphy, LA Spangle - Journal of the Chemical …, 1970 - pubs.rsc.org
The results of solvent-shift and hydrogen-bonding studies indicate that the (S)-sulphoxide
configuration can be assigned to the major sulphoxide oxidation products of Δ2- and Δ3-…

Aqueous acidic degradation of the carbacephalosporin loracarbef

…, JW Paschal, LJ Lorenz, LA Spangle… - Journal of …, 1993 - Elsevier
□ The aqueous degradation of the carbacephalosporin loracarbef under moderately acidic
conditions (pH range, 2.7 – 4.3) is described. Structures of a total of 10 compounds isolated …