enzymatic route for the synthesis of L-fucoseanalogs modified at the nonpolar terminus is reported. In particular, fucose derivatives bearing extended linear (1b) and branched (1e) saturated, or various unsaturated (1c, 1d) aliphatic chains have been prepared, in order to increase hydrophobic contacts. The rather general approach involves a sequential application of the recombinant enzymes L-fuculose 1-phosphate
Falcipain Inhibitors: Optimization Studies of the 2-Pyrimidinecarbonitrile Lead Series
作者:Jose M. Coterón、David Catterick、Julia Castro、María J. Chaparro、Beatriz Díaz、Esther Fernández、Santiago Ferrer、Francisco J. Gamo、Mariola Gordo、Jiri Gut、Laura de las Heras、Jennifer Legac、Maria Marco、Juan Miguel、Vicente Muñoz、Esther Porras、Juan C. de la Rosa、Jose R. Ruiz、Elena Sandoval、Pilar Ventosa、Philip J. Rosenthal、Jose M. Fiandor
DOI:10.1021/jm100556b
日期:2010.8.26
were studied as potential falcipaininhibitors and therefore potential antiparasitic lead compounds, with the 5-substituted-2-cyanopyrimidine chemical class emerging as the most potent and promising leadseries. Through a sequential leadoptimization process considering the different positions present in the initial scaffold, nanomolar and subnanomolar inhibitors at falcipains 2 and 3 were identified
Pd-Catalyzed Arylation of 1,2-Amino Alcohol Derivatives via β-Carbon Elimination
作者:Miquel A. Pericàs、Ruben Martin、Miriam Sau
DOI:10.1055/a-1699-4766
日期:2022.1
AbstractHerein, we describe a Pd-catalyzed arylation of 1,2-amino alcohols with aryl halides enabled by a retroallylation manifold. This protocol constitutes a new entry point to β-arylated aldehydes via the intermediacy of in situ generated enamine intermediates. The protocol is characterized by its exquisite regioselectivity profile and broad substrate scope – including challenging substrate combinations
The mechanism of ozone-alkene reactions in the gas phase. A mass spectrometric study of the reactions of eight linear and branched-chain alkenes
作者:Richard I. Martinez、John T. Herron、Robert E. Huie
DOI:10.1021/ja00403a031
日期:1981.7
The stable products of the low-pressure (4-8 torr (1 torr = 133.33 Pa)) gas-phase reactions of ozone with ethene, propene, 2-methylpropene, cis-2-butene, trans-2-butene, trans-2-pentene, 2,3-dimethyl-2-butene, and 2-ethyl- 1 -butene have been identified by using a photoionization mass spectrometer coupled to a stirred-flow reactor. The products observed are characteristic of (i) a primary Criegee split
Rate Constants for the Gas-Phase Reactions of OH Radicals with a Series of Hydroxyaldehydes at 296 ± 2 K
作者:Jillian Baker、Janet Arey、Roger Atkinson
DOI:10.1021/jp048979o
日期:2004.8.1
generated in situ from the OH radical-initiated reactions of precursor compounds (1,2- and 1,3-butanediol, 2-methyl-2,4-pentanediol, 2-methyl-3-buten-2-ol, and cis-3-hexen-1-ol) and the rateconstants for the reaction of OH radicals with the hydroxyaldehydes were determined relative to those for reaction of OH radicals with the precursor compound. The rateconstants obtained (in units of 10-11 cm3 molecule-1