Substrate Activity Screening: A Fragment-Based Method for the Rapid Identification of Nonpeptidic Protease Inhibitors
作者:Warren J. L. Wood、Andrew W. Patterson、Hiroyuki Tsuruoka、Rishi K. Jain、Jonathan A. Ellman
DOI:10.1021/ja0547230
日期:2005.11.1
A new fragment-basedmethod for the rapid development of novel and distinct classes of nonpeptidic protease inhibitors, SubstrateActivityScreening (SAS), is described. This method consists of three steps: (1) a library of N-acyl aminocoumarins with diverse, low molecular weight N-acyl groups is screened to identify protease substrates using a simple fluorescence-based assay, (2) the identified N-acyl
Facile Synthesis of CarboxylicAnhydrides Using 4,5-Dichloro-2-[(4-nitrophenyl)sulfonyl]pyridazin-3(2<i>H</i>)-one
作者:Yong-Jin Yoon、Jeum-Jong Kim、Yong-Dae Park、Woo Song Lee、Su-Dong Cho
DOI:10.1055/s-2003-40512
日期:——
A novel and facile synthesis of carboxylic anhydrides from carboxylicacidusing 4,5-dichloro-2-[(4-nitrophenyl)sulfonyl[pyridazin-3(2H)-one (2) is presented. Treatment of aliphatic or aromaticcarboxylicacids with 2 in the presence of base in organic solvents gave the corresponding anhydrides in good or excellent yields.
A convenient method has been developed, which allows for the direct transformation of aryl iodides into the corresponding carboxylic acid anhydrides viaPd-catalyzed carbonylation under atmospheric CO pressure.
Anhydrides from aldehydes or alcohols via oxidative cross-coupling
作者:Silvia Gaspa、Ida Amura、Andrea Porcheddu、Lidia De Luca
DOI:10.1039/c6nj02625g
日期:——
A novel type of metal-free oxidative cross-coupling for the synthesis of symmetrical and mixed anhydrides from aldehydes or benzylic alcohols has been developed. The aldehydes or alcohols were converted in situ into their corresponding acyl chlorides, which were then reacted with an array of carboxylic acids. The methodology has a general applicability, and was successfully employed to prepare either
construction of diverse C–C bonds. Conventional cross-coupling reactions require active electrophilic coupling partners, such as organohalides or sulfonates, which are not environmentally friendly enough. Herein, we disclose the first nickel-catalyzed Suzuki–Miyaura cross-coupling of aryl anhydrides and arylboronicacids for the synthesis of biaryls in a decarbonylation manner. The reaction tolerates a wide range