Triethylamine → HCID 117628569, compound

Temperature

0 °C

Freshly distilled tetrahydrothiapyran-3-ol (8.97 g, 75.3 mmol) and triethylamine (10.6 mL, 75.5 mmol) were dissolved in anhydrous tetrahydrofuran (THF) (40 mL) and cooled to 0° C. Methacryloyl chloride (8.1 mL, 83.2 mmol) was then added slowly, dropwise. The reaction then was warmed slowly to room temperature. After stirring overnight, 30 mL DIW were added and the mixture was made basic with 5 M NaOH. The THF then was removed by rotary evaporation and the product was extracted with diethyl ether (3×40 mL). The ether extracts were combined and washed with 0.1 M NaOH, followed by DIW before being dried over sodium sulfate and filtered. The product was then concentrated by rotary evaporation and dried in vacuo to afford tetrahydro-2H-thiopyran-3-yl methacrylate as a light orange liquid (7.63 g, 54%). 1H NMR (600 MHz, CDCl3, ppm) δ 6.08 (s, 1H), 5.54 (s, 1H), 4.94 (m, 1H), 2.78 (m, 1H), 2.62 (m, 1H), 2.49 (m, 1H), 2.47 (m, 1H), 2.14 (m, 1H), 1.99 (m, 1H), 1.91 (s, 3H), 1.85 (m, 1H), 1.49 (m, 1H). 13C NMR (150 MHz, CDCl3, ppm) δ 166.61, 136.69, 125.62, 71.21, 32.26, 31.82, 28.10, 27.43, 18.43.

1. customThe reaction
2. temperaturethen was warmed slowly to room temperature
3. addition30 mL DIW were added
4. customThe THF then was removed by rotary evaporation
5. extractionthe product was extracted with diethyl ether (3×40 mL)
6. washwashed with 0.1 M NaOH
7. dry with materialbefore being dried over sodium sulfate
8. filtrationfiltered
9. concentrationThe product was then concentrated by rotary evaporation
10. customdried in vacuo

ORD record

ord-0c3ba2f64d5c409aa0910bf26b77e9e8

Source dataset

uspto-grants-2015_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08974995B2