HCID 13393783, compound → Flavanone

Participants

Reaction Steps

Analogously, (-)-sodium 4H-4-phenyl-thieno[3,2-c][1]benzopyran-2-carboxylate, [α]43625 =-89° (c=0.5, methanol), is prepared starting from the pure enantiomeric 4-chloro-3-formyl-flav-3-ene which is obtained by chloroformylation of (-)-flavanone [(-) at 436 nm]. The preparation of (+)- and (-)-flavanone is described e.g. in Tetrahedron Lett. 26, 2305 (1970) and Acta Chim. Acad. Sci. Hung. 86, 161 (1975).

Provenance & Evidence