March 1998 issue
cif-access (organic compounds)
In the title compound (efaroxan hydrochloride), homochiral cationic molecules form chains along the b axis of the triclinic cell via N-H⋯Cl hydrogen bonds. The furanyl groups are nearly parallel to the a axis and the imidazolinium rings are roughly perpendicular to it.
The structure and relative stereochemistry of O-methyldehydronorcacalol, a sesquiterpenoid isolated from Traversia baccharoides Hook f., is established. The hydroxyl group takes part in a bifurcated hydrogen bond, intramolecular with an adjacent methoxy O atom and intermolecular with an acetyl O atom of an adjacent molecule.
1,3-Oxazolidines are powerful chiral templates for auxiliary-directed asymmetric synthesis. The stereochemical parameters of the title compound are in good agreement with other arylsulfonyloxazolidines.
In the title molecule, the dihydropyran ring adopts a sofa conformation. The benzopyran ring is distorted from planarity and the phenyl ring forms a dihedral angle of 53.86 (6)° with the dihydropyran ring.