coupling and intramolecular amidation of 2-carboxybenzaldehyde and amines. This one-potsynthesis gives excellent yields using ultrathin Pt nanowires as catalysts under 1 bar of hydrogen. These unsupported catalysts can also be used for the synthesis of phthalazinones in high yield when hydrazine or phenyl hydrazine is used instead of amines.
A NOVEL METHOD FOR THE SYNTHESIS OF 1(2H)- PHTHALAZINONE DERIVATIVES USING HETEROPOLYACIDS AS HETEROGENEOUS AND RECYCLABLE CATALYSTS
作者:Majid M. Heravi、Bita Baghernejad、Hossein A. Oskooie、Fatemeh F. Bamoharram
DOI:10.1515/hc.2008.14.5.375
日期:2008.1
A simple and efficient synthesis of 1(2H)phthalazinone derivatives was achieved via a reaction of phthalaldehydicacid and various phenyl hydrazines in CHCI3 in the presence of a catalytic amount of different heteropolyacids (HPAs) in very good yields.
K-10 effectively catalyzed the condensation and substitution reactions. The approach was based on the direct cyclization of phthalaldehydicacid and opianic acid with substituted hydrazines. The reactions provided excellent yields and high selectivities in very short time (5-35 minutes). phthalazinones - phthalaldehydicacid - opianic acid - hydrazines - montmorillonite K-10 - microwave heating
Methods of inhibiting a tyrosine kinase wherein said tyrosine kinase is BTK or SYK comprising administering to a patient in need thereof a therapeutically effective amount of a compound according to formula I are disclosed. The compounds are useful for treating auto-immune and inflammatory diseases.