反应详情

A solution of 20 (362 mg, 0.63 mmol) in MeOH (10 mL) was treated with 1M NaOH (2 mL) at ambient temperature. After 1 h, the solution was concentrated and diluted with EtOAc and 1M HCl. The layers were separated and the aqueous phase was extracted with EtOAc. The combined organic extracts were washed successively with 1M HCl, brine, dried over anhydrous Na2SO4, filtered and concentrated to afford 21 as a yellow-colored foam (278 mg) which was used without further purification.

1. concentrationthe solution was concentrated
2. additiondiluted with EtOAc and 1M HCl
3. customThe layers were separated
4. extractionthe aqueous phase was extracted with EtOAc
5. washThe combined organic extracts were washed successively with 1M HCl, brine
6. dry with materialdried over anhydrous Na2SO4
7. filtrationfiltered
8. concentrationconcentrated