Formaldehyde → 2-Fluoro-2-nitropropane-1,3-diol

Temperature

2 °C

A suspension of 89.2 g (0.40 mole) of diethyl fluoronitromalonate in 80 ml (1.0 mole) of 37% aqueous formaldehyde was cooled in an ice-bath to 2° C. A solution of 66.0 g (1.60 mole) of sodium hydroxide in 400 ml of water was then added dropwise with vigorous stirring over 100 minutes, below 10° C. After the reaction mixture was stirred overnight in the ice-bath, it was filtered and the filtrate was extracted with ethyl acetate (3×1000 ml). The ethyl acetate solution was dried over sodium sulfate and distilled (0.17 mm/170° bath) to give 25.5 g (45.9%) of 2-fluoro-2-nitro-1,3-propanediol; mp 86°-87° C.; 1HNMR (acetone-d6) δ3.90 (d, J=6Hz, 2 H, --CH2 --), 4.20 (t, J=6Hz, 2 H, --CH2 --), 4.80 (t, J=6Hz, 2 H, --OH); 19FNMR (acetone-d6) φ145.6 (quintuplet J=16Hz). IR (CH2Cl2) 3620 (--OH), 1575, 1335 (--NO2), 1040 cm-1 (C=F).

1. filtrationwas filtered
2. extractionthe filtrate was extracted with ethyl acetate (3×1000 ml)
3. dry with materialThe ethyl acetate solution was dried over sodium sulfate
4. distillationdistilled (0.17 mm/170° bath)

ORD record

ord-def25dd0b36a4525aaffecd206d68afd

Source dataset

uspto-grants-1980_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04215228