Darstellung einiger 4- und 5-substituierter Pyridin-2-Carbonsäuren als Fusarsäureanaloga

5-Substituted picolinic acids I (R = NO2, NH2, NHAc, NHCOEt, NHOH, iodo, Br, OH, MeO, PrO, BuO; R1 = H) and 4-substituted fusaric acids I (R = Bu, R1 = NO2, MeO, EtO, Cl, NH2, NHOH, Me), selected by a random sampling procedure suitable for small series, were prepd. for future studies on the structure-activity relationships involved in the inhibition of dopamine b-hydroxylase. The known prepn. of I (R = NO2, R1 = H) via a Rosenmund-von Braun reaction with 2-bromo-5-nitropyridine was significantly improved. I (R = OH, R1 = H), easily accessible via the same method, was converted into 5-alkoxypicolinic acids by reaction with alkyl halides in DMSO in the presence of Ag2O. I (R = Bu) were prepd. via 5-butyl-2-methyl-4-nitropyridine N-oxide

The Influence Of Seller Strategy On The Winning Price In Online Auctions: A Moderated Mediation Model

This paper examines the impact of seller strategy on winning prices in online auctions. In our conceptual model, three strategic choices made by the seller - minimum opening price, auction length, and use of a hidden reserve price - are mediated by the number of bids placed during the auction and moderated by product type. Our tests analyze eBay auction data for four consumer products through two matched studies (two products per study). In particular, we compare products for which value is easily determined with those for which value is less clear. Overall, we find strong evidence of the effects of minimum opening price and hidden reserve prices on final winning prices. The impact of auction length on winning price is less clear. In general, our tests support the idea that potential buyers rely more on signals such as opening price and reserve price for products for which reference prices are less available. © 2008 Elsevier Inc. All rights reserved

Kupfer-Komplexbildungskonstanten einiger Fusarsäureanaloga

Formation consts. were detd. for 1:2 Cu2+ complexes with fusaric acid and 10 4-substituted derivs. by spectrophotometry (230-300 nm). A linear relation, logKCu = -1.057pKa - 2.356pKb + 43695, was found between the stability consts. and the ligand acidity and basicity consts

The influence of seller strategy on the winning price in online auctions: A moderated mediation model

This paper examines the impact of seller strategy on winning prices in online auctions. In our conceptual model, three strategic choices made by the seller - minimum opening price, auction length, and use of a hidden reserve price - are mediated by the number of bids placed during the auction and moderated by product type. Our tests analyze eBay auction data for four consumer products through two matched studies (two products per study). In particular, we compare products for which value is easily determined with those for which value is less clear. Overall, we find strong evidence of the effects of minimum opening price and hidden reserve prices on final winning prices. The impact of auction length on winning price is less clear. In general, our tests support the idea that potential buyers rely more on signals such as opening price and reserve price for products for which reference prices are less available.Online auctions Auction pricing Internet auctions Pricing