反应详情

On carrying out the operation according to the procedure of Example 58 starting with 5.1 g of 1-[bis(4-chlorophenyl)methyl]-3-{[3-(tert-butyldimethylsilyloxymethyl)phenyl](methylsulfonyl)methylene}azetidine and 17 cm3 of a 1 M solution of tetrabutylammonium fluoride in tetrahydrofuran, the residue obtained is purified by chromatography on a silica gel column (particle size 0.04-0.06 mm, diameter 2 cm, height 30 cm), at a nitrogen pressure of 0.5 bar with a dichloromethane and ethanol mixture (97/3 by volume) as eluent and collecting 100 cm3 fractions. Fractions 10 to 14 are combined, concentrated to dryness under reduced pressure (2.7 kPa). The yellow solid obtained is taken up in 2 cm3 of dichloromethane and 10 cm3 of ethyl acetate and then filtered on sintered glass and washed with 2 cm3 of ethyl acetate. 1.6 g of 1-[bis(4-chlorophenyl)methyl]-3-[(3-hydroxymethylphenyl)(methylsulfonyl)methylene]azetidine are obtained in the form of a white solid melting at 214° C. [NMR spectrum in DMSO-d6, T=300K, δ in ppm (400 MHz): 2.95 (3H, s, SCH3), 3.80 (2H, s, NCH2), 4.20 (2H, s, NCH2), 4.50 (2H, d, J=5 Hz, OCH2), 4.80 (1H, s, NCH), 5.25 (1H, t, J=5 Hz, OH), 7.30 (1H, d, J=7 Hz, CH arom.), between 7.35 and 7.45 (7H, m, 7CH arom.), 7.50 (4H, d, J=7 Hz, 4CH arom.)].

1. customthe residue obtained
2. customis purified by chromatography on a silica gel column (particle size 0.04-0.06 mm, diameter 2 cm, height 30 cm), at a nitrogen pressure of 0.5 bar with a dichloromethane and ethanol mixture (97/3 by volume) as eluent
3. customcollecting 100 cm3 fractions
4. concentrationconcentrated to dryness under reduced pressure (2.7 kPa)
5. customThe yellow solid obtained
6. filtration10 cm3 of ethyl acetate and then filtered on sintered glass
7. washwashed with 2 cm3 of ethyl acetate