15026-16-1

Upstream product

• 926-26-1 di-tert-Butyl succinate 
• 15023-79-7 ethyl 2-oxo-4-phenylbutyrate 
• 5292-43-3 bromoacetic acid tert-butyl ester 
• 140-11-4 Benzyl acetate 
• 100-51-6 benzyl alcohol 
• 100-39-0 benzyl bromide 

Downstream Products

• 75784-66-6 C₁₄H₂₀O₄Si 
• 103-40-2 succinic acid monobenzyl ester 
• 15026-17-2 succinic acid mono-tert-butyl ester 
• 419542-87-3 tert-butyl 3-{2-[2-(benzyloxy)-2-oxoethyl]-5,5-dimethyl-1,3-dioxan-2-yl}propanoate 
• 419542-85-1 1-benzyl 6-tert-butyl-3-oxohexanedioate 

Relevant academic research and scientific papers

POLY-ADP RIBOSE POLYMERASE (PARP) INHIBITORS

The present invention is related to a pharmaceutical composition comprising a pharmaceutically acceptable carrier or diluent and a compound represented by the following structural formula: The present invention is also related a method of treating a subject with a disease which can be ameliorated by inhibition of poly(ADP-ribose)polymerase (PARP). The definitions of the variables are provided herein.

Nonactin biosynthesis: The initial committed step is the condensation of acetate (malonate) and succinate

Nonactin is a macrotetrolide antibiotic produced by Streptomyces griseus subsp. griseus ETH A7796 that has shown activity against the P170-glycoprotein efflux pump associated with multiple drug resistant cancer cells. Nonactin is a polyketide, albeit a highly atypical one. The structure is composed of two units of each of the enantiomers of nonactic acid, arranged in a macrocycle, so that the molecule has S4 symmetry and is achiral. The monomer units, (+)- and (-)-nonactic acid, are derived from acetate, succinate, and propionate, although the exact details of the assembly process are quite unclear. We have used feeding experiments with a series of multiple stable isotope labeled precursors to elucidate the details of the first committed step of nonactic acid biosynthesis. We have found that the 13C label from 3-ketoadipate is incorporated specifically into both nonactic acid and its homologue, homononactic acid. The data conclusively show that the first committed step of nonactin biosynthesis is the coupling of a succinate derivative with either acetate or malonate. The differentiation into either nonactate or homononactate occurs after the initial condensation; the homologues are not derived from use of a different "starter unit" by the nonactate polyketide synthase. The first step of nonactin biosynthesis involves achiral intermediates; differentiation between the known enantiocomplementary biosynthesis pathways to form each enantiomer of the precursor monomer units likely occurs after the initial condensation reaction.