HCID 22872556, compound → HCID 53719778, compound

Participants

Reaction Steps

Pyridinium chlorochromate (1.98 g, 9.20 mmol) was added to a mixture of (3β,5α,6α,25R)-3-ethoxy methoxy-6-hydroxyspirostane (0.90 g, 1.8 mmol) and celite (8.0 g) in anhydrous dichloromethane at 0° C. The reaction mixture was gradually warmed to ambient temperature over 1 hour and allowed to stir for an additional 5 hours. The reaction mixture was then filtered through a plug of silica gel using ether as the eluent. The combined ether fractions were concentrated in vacuo to afford 0.80 g (91%) of the title compound as a colorless solid. 1H NMR (250 MHz; CDCl3) d 4.75 (m, 2H); 4.4 (m, 1H); 3.6 (q, 2H, J=7.0 Hz); 3.45 (m, 2H); 3.35 (t, 1H, J=11.0 Hz); 2.4-0.6 (m, 40H); 0.9 (d, 3H, J=7.0 Hz); 0.8 (d, 3H, J=7.0 Hz); 0.78 (s, 6H). MS: 489.0 (M+H)+ ; mp 191-1930C.

Provenance & Evidence