Pyridine → HCID 22116720, compound

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

ORD record

ord-26e7875355c54bd9959941989fbcecfd

Source dataset

uspto-grants-1997_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05610252