A practicalone‐pot protocol for the synthesis of 2,5‐disubstitutedoxazoles from 1‐aryl‐2‐nitroethanones was reported. In the presence of iron/AcOH in acetonitrile, the reaction of 1‐aryl‐2‐nitroethanones with trimethyl orthoacetate or trimethyl orthobenzoate delivered the corresponding 2,5‐disubstitutedoxazoles in moderate to good yields.
The present invention relates to 3,8-diaza-bicyclo[4.2.0]oct-3-yl amide derivatives of formula (I), wherein the relative configuration of the diazabicyclooctane moiety is cis; and wherein Ar1, and Ar2 are as described in the description, to their preparation, to pharmaceutically acceptable salts thereof, and to their use as pharmaceuticals, to pharmaceutical compositions containing one or more compounds of formula (I), and especially to their use as orexin receptor antagonists.
The present invention relates to 3,8-diaza-bicyclo[4.2.0]oct-8-yl amide derivatives of formula (I) Formula (I) wherein the relative configuration of the diazabicyclooctane moiety is cis; and wherein Ar1, and Ar 2 are as described in the description, to their preparation, to pharmaceutically acceptable salts thereof, and to their use as pharmaceuticals, to pharmaceutical compositions containing one or more compounds of formula (I), and especially to their use as orexin receptor antagonists.
coupling partners for the phosphorus-directed rhodium(III)-catalyzed direct C–H arylation of polyaromatic phosphines. We report herein simple conditions for the peri-C–H functionalization of polyarylphosphines, where a [Rh(III)Cl2Cp*]2 precatalyst is employed to provide a convenient access to polyarylated phosphines in up to 93% isolated yield. This synthetic approach tolerates a wide range of different aryl