The nitroderivatives 1a–c were found to react with the title ynamine 2 under mild conditions to give the corresponding fused isoxazoles 3a–c, as proved by an X-ray diffraction of 3a; a plausible mechanistic pattern for these conversions is presented.
The nitroester (1) was shown to give rise to 1,3-dipolar cycloadditions with diazomethane and 2-diazopropane,affording the bicyclic derivatives (4) and (5)via the unstable primary cycloadducts (2) and (3), respectively.
COMPOUNDS AND COMPOSITIONS AS INHIBITORS OF CANNABINOID RECEPTOR 1 ACTIVITY
申请人:Liu Hong
公开号:US20090247517A1
公开(公告)日:2009-10-01
The invention provides compounds, pharmaceutical compositions comprising such compounds and methods of using such compounds to treat or prevent diseases or disorders associated with the activity of Cannabinoid Receptor 1 (CB1).
Compounds and compositions as inhibitors of cannabinoid receptor 1 activity
申请人:IRM LLC
公开号:US08158634B2
公开(公告)日:2012-04-17
The invention provides compounds having Formula Ia,
or a pharmaceutically acceptable salt thereof, wherein R1, R2, R3, R4 and Y are as defined in the specification; as well as pharmaceutical compositions comprising such compounds and methods of using such compounds to treat or prevent diseases or disorders associated with the activity of Cannabinoid Receptor 1 (CB1).
The title compound (2) was found to undergo a (2 + 4) cycloaddition with 2,3-dimethylbuta-1,3-diene affording the tetrahydro-1,2-benzisoxazole (3), which could be easily converted into the corresponding dihydro derivative (4) by elimination of the NO2 and CO2Et groups.