Pyridine → HCID 22116720, compound

To a 1 L 4-neck round bottom flask fitted with a mechanical stirrer, thermometer, condenser, dropping funnel and nitrogen blanket was added 31.2 g (250 mmol) of 2-bromoethanol, 21.4 g (270 mmol) of pyridine and 400 mL of ether. The reaction was cooled with an ice-water bath to less than 10° C. then 28.8 g (270 mmol) of vinyl chloroformate was added so that the temperature remained below 10° C. The reaction was stirred to room temperature for 27 hours. Then the organics were washed twice with 2N HCl, twice with 2N NaOH, then dried over magnesium sulfate. The solvent was removed on a rotary evaporator and the resulting oil was passed through a short silica gel column, to remove most of the color, to give 38.4 g (197 mmol, 78.8% yield). FTIR (neat, capillary) 3672.76, 3469.03, 3096.75, 2972.97, 2155.40, 2057.14, 1754.37, 1648.44, 1563.96, 1455.87, 1443.36, 1427.17, 1388.17, 1299.17, 1285.60, 1244.29, 1221.29, 1152.23, 1095.86, 1049.38, 988.10, 940.93, 897.08, 875.78, 828.81, 778.74, 738.01, 694.54, 663.28. NMR (CDCl3) 6.85-7.23 (1H,q), 4.40-5.10 (4H,m), 3.42-3.59 (2H,t).

1. customTo a 1 L 4-neck round bottom flask fitted with a mechanical stirrer
2. customthermometer, condenser, dropping
3. temperatureThe reaction was cooled with an ice-water bath to less than 10° C.
4. customremained below 10° C
5. washThen the organics were washed twice with 2N HCl, twice with 2N NaOH
6. dry with materialdried over magnesium sulfate
7. customThe solvent was removed on a rotary evaporator
8. customto remove most of the color
9. customto give 38.4 g (197 mmol, 78.8% yield)

ORD record

ord-666a4f417e494050ac94d42722d2a4e3

Source dataset

uspto-grants-1991_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05070215