(S)-diethyl [3-(4-methoxybenzyloxy)-2-oxo-5-triethylsilanyloxy-pentyl]-phosphonate

(S)-3,6-dihydro-4-methyl-2H-pyran-2-carbaldehyde

(S)-2-allyloxy-4-methyl-1-trityloxy-4-pentene

(S)-4-methyl-1-trityloxymethyl-3,6-dihydro-2H-pyran

(2S)-2-(4-methoxybenzyloxy)-4-methyl-3,6-dihydro-2H-pyran