반응 #53459

반응 방정식

sodium hydroxide

(RS)-1-{(4-chlorophenyl)(4-formylphenyl)methyl}-3-[(3,5-difluorophenyl)(methylsulfonyl)methylene]azetidine

sodium triacetoxyborohydride

pyrrolidine

→

(RS)-1-{(4-chlorophenyl)[4-(pyrrolidylmethyl)phenyl]methyl}-3-[(3,5-difluorophenyl)(methylsulfonyl)methylene]azetidine

수율 51.1%

용매

1,2-dichloroethane

반응 조건

후처리

1. 1
   추출the product is extracted with 100 cm3 of dichloromethane
2. 2
   세척the organic phase is washed twice with 50 cm3 of water
3. 3
   건조50 cm3 of a saturated sodium chloride solution, dried over magnesium sulfate
4. 4
   여과filtered
5. 5
   농축concentrated to dryness under reduced pressure (2.7 kPa)
6. 6
   기타The residue obtained
7. 7
   기타is chromatographed on a silica gel column (particle size 0.04-0.06 mm, diameter 4.1 cm, height 13 cm), at an argon pressure of 0.5 bar with acetate as eluent
8. 8
   기타collecting 20 cm3 fractions
9. 9
   농축concentrated to dryness under reduced pressure (2.7 kPa)

실험 절차

0.75 g of (RS)-1-{(4-chlorophenyl)(4-formylphenyl)methyl}-3-[(3,5-difluorophenyl)(methylsulfonyl)methylene]azetidine and then 0.68 g of sodium triacetoxyborohydride are added to a solution of 0.10 g of pyrrolidine in 20 cm3 of 1,2-dichloroethane. After 20 hours at room temperature, 2 cm3 of 1 N sodium hydroxide are added, the product is extracted with 100 cm3 of dichloromethane, the organic phase is washed twice with 50 cm3 of water and then 50 cm3 of a saturated sodium chloride solution, dried over magnesium sulfate, filtered and concentrated to dryness under reduced pressure (2.7 kPa). The residue obtained is chromatographed on a silica gel column (particle size 0.04-0.06 mm, diameter 4.1 cm, height 13 cm), at an argon pressure of 0.5 bar with acetate as eluent and collecting 20 cm3 fractions. Fractions 10 to 18 are combined and then concentrated to dryness under reduced pressure (2.7 kPa). 0.39 g of (RS)-1-{(4-chlorophenyl)[4-(pyrrolidylmethyl)phenyl]methyl}-3-[(3,5-difluorophenyl)(methylsulfonyl)methylene]azetidine is obtained in the form of a white foam [NMR spectrum in DMSO-d6, T=300K, δ in ppm (300 MHz): 1.65 (4H, m, 2CH2), 2.40 (4H, m, 2NCH2), 3.02 (3H, s, SCH3), 3.50 (2H, s, NCH2Ph), 3.85 (2H, s, NCH2), 4.20 (2H, s, NCH2), 4.75 (1H, s, NCH), between 7.15 and 7.40 (9H, m, 9CH arom.), 7.48 (2H, d, J=7 Hz, 2CH arom.)].

출처