{(1R,2R)-2-benzyloxy-1-[(methoxymethylcarbamoyl)methoxymethyl]propyl}carbamic acid t-butyl ester → {(1R,2R)-2-benzyloxy-1-[2-(4-chlorophenyl)-2-oxoethoxymethyl]propyl}carbamic acid t-butyl ester

温度

0 °C

A solution of {(1R,2R)-2-benzyloxy-1-[(methoxymethylcarbamoyl)methoxymethyl]propyl}carbamic acid t-butyl ester (2.42 g) in tetrahydrofuran (50 mL) was cooled to −40° C. and to the mixture was then dropwise added 4-chlorophenylmagnesium bromide (18.3 mL, 1 M tetrahydrofuran solution). The resultant solution was stirred for 1 hour at −40° C., after which the temperature was slowly raised to 0° C. The solution was then diluted with saturated aqueous ammonium chloride. The resultant solution was extracted using ethyl acetate. The organic layer was washed with brine, and then dried over anhydrous magnesium sulfate. Solvent was removed by distillation under reduced pressure, and the resulting residue was purified by silica gel column chromatography (heptane/ethyl acetate 9/1→1/1), to thereby obtain the titled compound (2.61 g). The physical properties of this crude product were as follows.

1. extractionThe resultant solution was extracted
2. washThe organic layer was washed with brine
3. dry with materialdried over anhydrous magnesium sulfate
4. customSolvent was removed by distillation under reduced pressure
5. customthe resulting residue was purified by silica gel column chromatography (heptane/ethyl acetate 9/1→1/1)

ORDレコード

ord-4c957e16d1a84e578fc1b0ae8c2d812d

出典データセット

uspto-grants-2010_06

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07737141B2