Ammonium Chloride → HCID 58695680、化合物

温度

0 °C

92 mL of a 1 mol/L methyl magnesium bromide/tetrahydrofuran solution and 23 mL of a 3 mol/L methyl magnesium bromide/diethyl ether solution were added dropwise to a solution of 23.2 g of (2S,4R,5R)-4-(benzyloxy)-5-((benzyloxy)methyl)-2-methoxyoxolane-3-one in 100 mL of tetrahydrofuran at −40° C., and the obtained mixture was then stirred at the same temperature as described above for 30 minutes. Thereafter, the temperature of the reaction mixture was increased to 0° C. over 1 hour, and 500 mL of a saturated ammonium chloride aqueous solution and 500 mL of ethyl acetate were then added to the mixture. The organic layer was fractionated, and it was washed with 300 mL of a saturated sodium chloride aqueous solution and was then dried over anhydrous magnesium sulfate. The solvent was distilled away under reduced pressure, and the obtained residue was then purified by silica gel column chromatography, so as to obtain 12.0 g of (2S,3R,4R,5R)-4-(benzyloxy)-5-((benzyloxy)methyl)-2-methoxy-3-methyloxolan-3-ol in the form of a colorless oily product.

1. customas described above for 30 minutes
2. washit was washed with 300 mL of a saturated sodium chloride aqueous solution
3. dry with materialwas then dried over anhydrous magnesium sulfate
4. distillationThe solvent was distilled away under reduced pressure
5. customthe obtained residue was then purified by silica gel column chromatography

ORDレコード

ord-91850c2481f34a4e9f52ca728e6b73fa

出典データセット

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US09221865B2