Published online by Cambridge University Press: 13 March 2013
The stereoselective synthesis of 7-fluoro-2-exo-(2-methylpropen-1-yl)-2,3,4,5-tetrahydro-1,4-epoxybenzo[b]azepine was developed by intramolecular 1,3-dipolar cycloaddition of the nitrone derived from the corresponding 2-allyl-4-fluoro-N-(3-methylbut-2-enyl)aniline. The X-ray powder diffraction (XRPD) pattern for the new compound was analyzed and found to crystallize in a monoclinic system with space group P21/m (No. 11) and refined unit-cell parameters a = 11.655(5) Å, b = 5.850(2) Å, c = 18.314(4) Å, β = 104.27(3) and V = 1210.1 (6) Å3.