反应详情

To a stirred solution of 3-tert-butoxycarbonylthiazolidine4-carboxylic acid (2.3 g, 10.0 mmol) in THF (30 ml) was added BH3.THF(1.0 M solution in THF, 20.0 ml, 20.0 mmol) at 0° C. After stirred at room temperature for 1.0 h, the reaction mixture was heated under reflux for 1.0 hr. After cooled, the mixture was concentrated in vacuo. Water was added thereto at 0° C., and extracted with EtOAc. The extract was washed with water, then dried over Na2SO4, and concentrated in vacuo to give 3-tert-butoxycarbonyl-5-hydroxymethylthiazolidine (2.0 g , quant) as a a colorless oil. 1H-NMR (CDCl3) δ 1.48 (s, 9H), 2.80–2.85 (m, 1H), 3.13–3.17 (m, 1H), 3.20–3.30 (m, 1H), 3.64–3.70 (m, 2H), 4.34 (br s, 1H), 4.60 (br s, 1H).

1. temperaturethe reaction mixture was heated
2. temperatureunder reflux for 1.0 hr
3. temperatureAfter cooled
4. concentrationthe mixture was concentrated in vacuo
5. additionWater was added
6. extractionat 0° C., and extracted with EtOAc
7. washThe extract was washed with water
8. dry with materialdried over Na2SO4
9. concentrationconcentrated in vacuo