Development of drug intermediates by using direct organocatalytic multi-component reactions
作者:Dhevalapally B. Ramachary、M. Kishor、G. Babul Reddy
DOI:10.1039/b602696f
日期:——
Novel, economic and environmentally friendly one-pot three-component Knoevenagel/hydrogenation (K/H) and four-component Knoevenagel/hydrogenation/alkylation (K/H/A) reactions of ketones, CH-acids, dihydropyridines and alkyl halides using proline and proline/metal carbonate catalysis, respectively, have been developed. Many of the products of these K/H and K/H/A reactions have direct applications in pharmaceutical chemistry.
Room Temperature, Reductive Alkylation of Activated Methylene Compounds: Carbon–Carbon Bond Formation Driven by the Rhodium-Catalyzed Water–Gas Shift Reaction
作者:Scott E. Denmark、Malek Y. S. Ibrahim、Andrea Ambrosi
DOI:10.1021/acscatal.6b03183
日期:2017.1.6
The rhodium-catalyzed water–gas shift reaction has been demonstrated to drive the reductive alkylation of several classes of activated methylene compounds at room temperature. Under catalysis by rhodium trichloride (2–3 mol %), carbon monoxide (10 bar), water (2–50 equiv), and triethylamine (2.5–7 equiv), the scope has been successfully expanded to cover a wide range of alkylating agents, including
The present invention relates to pyrazolopyrimidines according to formula (I)
1
and stereoisomers, isomers and salts thereof wherein R
1
-R
5
are selected from certain alkyl, aryl and heteroaryl species as defined in the specification wherein all of the compounds are useful as CRF antagonists and are thus useful in the treatment of neurological disorders as well as a multitude of other CRF associated diseases or conditions.