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Nimbolide and isonimbolide
Attempts were made to cleave the ether linkage in nimbolide using boron trifluoride etherate in the presence of tetrabutyl ammonium bromide to generate a ring-opened structure akin to azadirachtins, which are known to possess excellent antifeedant properties. Expand
In the title compound, C16H12O4, the 1-benzofuranone unit is in a planar conformation, and in the crystal, the molecules are stabilized by O—H⋯O (running parallel to the bc plane) and C—H–O hydrogen bonds. Expand
The isomeric compounds nimbolide and isonimbolide.
The reaction conditions are probably responsible for the ether cleavage, double-bond rearrangement and reformation of the ether linkage, and there are conformational changes in two cyclopentane rings and the side-chain -CH2COOMe group. Expand
The title compound, C(16)H(19)BrO(4), is a derivative of osthol, isolated from the seeds of Imperatoria Osthruthium, and was refined to a final R factor of 0.064. Expand
Microwave Assisted Regioselective Bromomethoxylation of Alkenes Using Polymer Supported Bromine Resins
A facile regio- and chemoselective bromomethoxylation of alkenes under microwave irradiation conditions employing a new polymer supported brominechloride resin is reported. The resin is prepared fromExpand