[EN] MONO HALOGEN OR METHYL-SUBSTITUTED 5-HT2B ANTAGONISTS WITH INCREASED ACTIVITY<br/>[FR] ANTAGONISTES DE 5-HT2B SUBSTITUÉS PAR MONO-HALOGÈNE OU MÉTHYLE AYANT UNE ACTIVITÉ ACCRUE
申请人:NAT INSTITUTE OF BIOLOGICAL SCIENCES BEIJING
公开号:WO2020063999A1
公开(公告)日:2020-04-02
Disclose herein are mono halogen or methyl-substituted 5-HT 2B antagonist compounds, which have been found with increased binding activity to 5-HT 2B receptor due to the substitution of halogen or methyl, and the method of using the compounds of treating or preventing a disorder mediated by 5-HT 2B.
A novel metal-free synthesis of 3-substituted isocoumarins through a sequential O-acylation/Wittig reaction has been established. The readily accessible (2-carboxybenzyl)-triphenylphosphonium bromide and diverse chlorides produced various 1H-isochromen-1-one in the presence of triethylamine, employing sequential O-acylation and an intramolecular Wittig reaction of acid anhydride. Reactions using these