(4S)-4-[(Hexadecyloxy)methyl]-2,2-dimethyl-1,3-dioxolane → (2R)-3-(Hexadecyloxy)-1,2-propanediol
反応式
[CH2:1]([O:17][CH2:18][C@H:19]1[CH2:23][O:22]C(C)(C)[O:20]1)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH3:16]>CO.Cl>[CH2:1]([O:17][CH2:18][C@H:19]([OH:20])[CH2:23][OH:22])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH3:16]参加物
4
実験手順
A stirred mixture of 28 g of (S)-4-[(hexadecyloxy)methyl]-2,2-dimethyl-1,3-dioxolane in 190 ml of methyl alcohol and 21 ml of 1N hydrochloric acid is refluxed for 2 hours followed by cooling in an ice bath. The resulting solid is filtered and washed with cold acetone. The solid is crystallized from acetone to give 18.2 g of crystals which liquified at ambient temperature. The resulting oil is purified by chromatography on silica gel using 1:1 ethyl acetate:hexanes. Fractions containing product are combined and evaporated to a material which is stirred with acetone at -20° C. to give 4.1 g of crystalline solid, m.p. 65°-66° C.