Réaction #70366

ord-fb790acbf638401c9ecf22110e11c42f

Équation de réaction

C[C@]12CCCCC1[C@@H](C=O)C[C@@H]1[C@@H]2CC[C@@]2(C)[C@H]1CC13OCCOC12OCCO3
17,17-bis(ethylendioxy)-6α-formylandrostane
C=C1C[C@@H]2[C@H](CC[C@]3(C)C(=O)CC[C@@H]23)[C@@]2(C)CCC(=O)CC12
6-methyleneandrostane-3,17-dione
→
C[C@]12CCC(=O)CC1[C@@H](C=O)C[C@@H]1[C@@H]2CC[C@]2(C)C(=O)CC[C@@H]12
6α-Formylandrostane-3,17-dione
Rendement 85.0%

Réactifs

C[C@]12CCCCC1[C@@H](C=O)C[C@@H]1[C@@H]2CC[C@@]2(C)[C@H]1CC13OCCOC12OCCO3
17,17-bis(ethylendioxy)-6α-formylandrostane
C=C1C[C@@H]2[C@H](CC[C@]3(C)C(=O)CC[C@@H]23)[C@@]2(C)CCC(=O)CC12
6-methyleneandrostane-3,17-dione

Réactifs

Aucun

Conditions de réaction

Conditions détaillées
See reaction.notes.procedure_details.

Traitement

  1. 1
    LavageThe combined organic extracts were washed with H2O
  2. 2
    Séchagedried over Na2SO4
  3. 3
    Autreevaporated to dryness
  4. 4
    Autreto give 6α-formylandrostane-3,17-dione

Mode opératoire

6α-Formylandrostane-3,17-dione was prepared in 85% yield from 3,3:17,17-bis(ethylendioxy)-6α-formylandrostane (Prepn. 14) by the procedure described above for the preparation of 6-methyleneandrostane-3,17-dione (II-ac, Prepn. 13). The combined organic extracts were washed with H2O, dried over Na2SO4 and evaporated to dryness to give 6α-formylandrostane-3,17-dione. 1H-NMR (300 MHz, acetone-d6, ppm from TMS): δ 9.50 (1H, d), 2.56-0.82 (21H, m), 1.16 (3H, s), 0.88 (3H, s).

Source

DOI: 10.6084/m9.figshare.5104873.v1Brevet: US08536160B2uspto-grants-2013_09