Reaction #86299

ord-9c957cb1185940138852f36f2ac6ed2c

Reaction equation

CC1CC2C3CCC4=CC(=O)CCC4(C)C3=CCC2(C)C1(C)C(=O)CO

17-(2-hydroxyacetyl)-10,13,16,17-tetramethyl-6,7,8,10,12,13,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3(2H)-one

CC(=O)OCC(=O)[C@@]1(C)[C@H](C)CC2C3CCC4=CC(=O)CC[C@]4(C)C3=CC[C@@]21C

2-oxo-2-((10S,13S,16R,17S)-10,13,16,17-tetramethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate

sodium methoxide

→

C[C@@H]1CC2C3CCC4=CC(=O)CC[C@]4(C)C3=CC[C@]2(C)[C@@]1(C)C(=O)CO

title compound

(10S,13S,16R,17S)-17-(2-hydroxyacetyl)-10,13,16,17-tetramethyl-6,7,8,10,12,13,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3(2H)-one

Reactants

17-(2-hydroxyacetyl)-10,13,16,17-tetramethyl-6,7,8,10,12,13,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3(2H)-one

2-oxo-2-((10S,13S,16R,17S)-10,13,16,17-tetramethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate

sodium methoxide

Reagents

None

Solvents

methanol

Conditions

Detailed conditions

See reaction.notes.procedure_details.

Workup

1
OtherThe mixture is partitioned between methylene chloride and sodium bicarbonate
2
OtherThe organic phase is separated
3
Washwashed with sodium bicarbonate
4
Dryingdried over sodium sulfate
5
Concentrationconcentrated

Procedure

10S,13S,16R,17S)-17-(2-hydroxyacetyl)-10,13,16,17-tetramethyl-6,7,8,10,12,13,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3(2H)-one: 2-oxo-2-((10S,13S,16R,17S)-10,13,16,17-tetramethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate (144 g) is stirred in 1500 ml methanol and treated with sodium methoxide (25%, 5 ml) for 30 minutes. The mixture is partitioned between methylene chloride and sodium bicarbonate. The organic phase is separated and washed with sodium bicarbonate, dried over sodium sulfate, and concentrated to give the title compound.

Source

DOI: 10.6084/m9.figshare.5104873.v1Patent: US09434758B2uspto-grants-2016_09