Isobutyric Acid → HCID 11411101, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of maytansinol (6.00 mg, 0.01062 mmol), isobutyric acid (23.60 mg, 0.2124 mmol), Sc(OTf)3 (3.14 mg, 0.00637 mmol) and DMAP (3.89 mg, 0.03186 mmol) in CH2Cl2 (1 mL) was stirred for 0.5 h at −8° C. DIC (29.49 mg, 0.2337 mmol) was added dropwise. The mixture was stirred till completion, quenched with diluted HCl, and extracted with CH2Cl2. The organic layer was washed with aq. NaHCO3, brine, and dried over anhydrous Na2SO4. The solvent was removed under reduced pressure. Chromatography (silica gel, CH2Cl2/MeOH 30:1) gave the desired product ansamitocin P3. LC-MS (M+Na+) calc.: 657.3. found: 657.4.

Provenance & Evidence