p-Toluenesulfonic acid → HCID 53789449, compound

A mixture of methyl glycerate (2 g, 0.17 moles) and bromoethanol (5.28 g, 0.42 moles was heated at 60° C. under nitrogen in the presence of a catalytic amount of p-toluene sulfonic acid for 10 h. The excess bromoethanol was removed on rotary evaporator under reduced pressure. The crude mixture was diluted with large volume of chloroform (100 mL) and the free acid was neutralized by adding anhydrous sodium carbonate. Filtration and removal of the solvent gave the crude product which was purified by chromatography on a silica gel column eluting with chloroform:methanol (9:1). Removal of the solvent on a rotary evaporator gave bromoethyl glycerate (3.26 g, 92% yield) which showed the following characteristics: 1H NMR (200 MHz, CDCl3), δ 3.52 (m, 2H, CH2Br), 3.90 (m, 2H,CO2CH2), 4.27 (s, 2H, OH), 4.36 (m, 2H, CH2OH), 4.52 (m, 1 H, CH), 13C NMR (50 MHz, CDCl3) δ 28.42, 63.76, 64.50, 71.58, 172.13.

1. customThe excess bromoethanol was removed on rotary evaporator under reduced pressure
2. additionThe crude mixture was diluted with large volume of chloroform (100 mL)
3. additionby adding anhydrous sodium carbonate
4. filtrationFiltration and removal of the solvent
5. customgave the crude product which
6. customwas purified by chromatography on a silica gel column
7. washeluting with chloroform:methanol (9:1)
8. customRemoval of the solvent
9. customon a rotary evaporator

ORD record

ord-927c7dd6a9c54b4aab3a94c48f4a6aa6

Source dataset

uspto-grants-1996_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05500139