The enantioselective synthesis of (1 R,3 R)-deoxynanaomycin A ( 4) is reported. The key step involves introduction of the stereocenter in ( S)-homoallylic alcohol 10A using an asymmetric allylation of aldehyde 9. Lithium-halogen exchange of bromo acetate 11 triggered rapid intramolecular cyclization furnishing lactol 12 that underwent silane-mediated reduction providing (1 R,3 S)-naphthopyran 13. Dihydroxylation