The first spontaneous resolution of a sulfoxide: Dianin's compound analogue, ( R )-4-(4-hydroxyphenyl)-2,2,4-trimethylthiachroman-1-oxide

The title sulfoxide, C 18 H 20 O 2 S, was prepared by controlled oxidation of thia -Dianin's compound using hydrogen peroxide in glacial acetic acid. On recrystallization from glacial acetic acid, it was found to form unsolvated, spontaneously resolved crystals, the initial crystal structure an...

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Bibliographic Details
Published in:Acta crystallographica. Section E, Crystallographic communications Crystallographic communications, 2018-11, Vol.74 (11), p.1633-1636
Main Authors: Gall, James H., White, J. Derek, MacNicol, David D., Frampton, Christopher S.
Format: Article
Language:English
Subjects:
crystal structure
hydrogen bonding
spontaneous resolution
thia-Dianin's compound
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Summary:The title sulfoxide, C 18 H 20 O 2 S, was prepared by controlled oxidation of thia -Dianin's compound using hydrogen peroxide in glacial acetic acid. On recrystallization from glacial acetic acid, it was found to form unsolvated, spontaneously resolved crystals, the initial crystal structure analysis revealing the presence of both sulfoxide epimers in the crystal. On multiple recrystallization a single epimer was observed, with crystallization occurring in the unchanged orthorhombic space group P 2 1 2 1 2 1 , with Z′ = 1. The molecule possesses a distal conformation, referring to the juxtaposition of the p -hydoxyphenyl substituent with respect to its syn- related methyl group, with the sulfoxide oxygen atom anti to the aromatic substituent. The molecular packing features O—H...O hydrogen bond chains running parallel to the b axis of the unit cell.
ISSN:2056-9890
2056-9890
DOI:10.1107/S2056989018014366