11beta,16alpha,17,21-Tetrahydroxypregn-4-ene-3,20-dione → 16alpha-(2,2-Diethoxyethoxy)-11beta,17,21-trihydroxypregn-4-ene-3,20-dione

HRID 918403Notes

Reaction equation

[CH2:1]([O:3][CH:4]([O:8][CH2:9][CH3:10])[CH:5]=[N+]=[N-])[CH3:2].C(OC(OCC)CNC(N)=O)C.[OH:23][C@H:24]1[CH2:44][C@@:43]2([CH3:45])[C@@H:35]([CH2:36][C@@H:37]([OH:47])[C@:38]2([OH:46])[C:39](=[O:42])[CH2:40][OH:41])[C@H:34]2[C@H:25]1[C@:26]1([CH3:49])[C:31]([CH2:32][CH2:33]2)=[CH:30][C:29](=[O:48])[CH2:28][CH2:27]1>CCOCC.CCCCC.CO>[CH2:1]([O:3][CH:4]([O:8][CH2:9][CH3:10])[CH2:5][O:47][C@@H:37]1[CH2:36][C@@H:35]2[C@:43]([CH3:45])([CH2:44][C@H:24]([OH:23])[C@H:25]3[C@H:34]2[CH2:33][CH2:32][C:31]2[C@:26]3([CH3:49])[CH2:27][CH2:28][C:29](=[O:48])[CH:30]=2)[C@@:38]1([OH:46])[C:39](=[O:42])[CH2:40][OH:41])[CH3:2]

Participants

Conditions

Temperature: 0 °C

Procedure

A solution of 2,2-diethoxy-1-diazoethane (prepared from 0.0935 mole of N-2,2-diethoxyethyl urea by the method of W. Kirmse and B. Buschhoff, Chem. Ber., 100, 1491 (1967)) in 300 ml of 3:2 ether pentane is diluted with 100 ml of methanol and cooled to 0°C. 11β,16α,17,21-Tetrahydroxypregn-4-ene-3,20-dione, 16,17-cycloborate is added in portions until nitrogen evolution ceases. The solvent is removed in vacuo and the residue is recrystallized from methanol to yield the title compound.

Workup

customThe solvent is removed in vacuo
customthe residue is recrystallized from methanol

Sources & evidence

ORD record: ord-7503150db3f24ed69c50a2ca3de1ccfc
Source dataset: uspto-grants-1976_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US03971773

Reaction notes

Loading…