The present invention provides imidazotriazinone compounds which are inhibitors of phosphodiesterase 9 and pharmaceutically acceptable salt thereof. The present invention further provides processes, pharmaceutical compositions, pharmaceutical preparations and pharmaceutical use of the compounds in the treatment of PDE9 associated diseases or disorders in mammals, including humans.
Synthesis of Cage Acylamino Derivatives in Nitric Acid Medium
作者:Yu. N. Klimochkin、M. V. Leonova、E. A. Ivleva、A. I. Kazakova、M. S. Zaborskaya
DOI:10.1134/s1070428021010012
日期:2021.1
Abstract An efficient procedure has been developed for the synthesis of secondary amides by the Ritter reaction of cage substrates with a wide series of nitriles in fuming nitric acid and its mixtures.
Synthesis of α-Amidoketones through the Cascade Reaction of Carboxylic Acids with Vinyl Azides under Catalyst-Free Conditions
作者:Cai Gao、Qianting Zhou、Li Yang、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.0c01871
日期:2020.11.6
An efficient synthesis of α-amidoketone derivatives through the cascade reactions of carboxylicacids with vinyl azides is presented. Compared with literature protocols, notable features of this new method include catalyst-free conditions, broad substrate scope, good tolerance of a wide range of functional groups, and high efficiency. In addition, the synthetic potential of this method as a tool for
General and selective <i>syn</i>-carboxylation-trifluoromethylation of terminal alkynes: application to the late-stage modification of dehydrocholic acid
alkynes by a Cu(III)–CF3 complex and a carboxylic acid regioselectively and with unusual syn-stereochemistry. This method is broadly applicable to various carboxylic acids and terminal alkynes, producing a range of biologically active trifluoromethyl enol carboxylic esters. The synthetic potential of this method is further demonstrated by the late-stage functionalization of a complex pharmaceutical compound
Gold Catalysis: No Steric Limitations in the Phenol Synthesis
作者:A. Stephen K. Hashmi、Ralph Salathé、Wolfgang Frey
DOI:10.1002/chem.200600533
日期:2006.9.6
Different dihydroisoindol-4-ols and 8-hydroxytetrahydroisoquinolines were prepared by the gold-catalyzed phenolsynthesis. The reaction was investigated with several sterically demanding groups in the 5-position of the furan starting material. The influence of the reaction time and the catalyst on the yield was investigated.