Selenium Dioxide → Exemestane

HRID 1383022

반응식

HRID 1383022 반응식
[CH2:1]=[C:2]1[C:19]2[C@:14]([CH3:21])([CH2:15][CH2:16][C:17](=[O:20])[CH:18]=2)[C@@H:13]2[C@H:4]([C@H:5]3[C@@:9]([CH2:11][CH2:12]2)([CH3:10])[C:8](=[O:22])[CH2:7][CH2:6]3)[CH2:3]1.[Se](=O)=O>C(O)(C)(C)C>[CH2:1]=[C:2]1[C:19]2[C@:14]([CH3:21])([CH:15]=[CH:16][C:17](=[O:20])[CH:18]=2)[C@@H:13]2[C@H:4]([C@H:5]3[C@@:9]([CH2:11][CH2:12]2)([CH3:10])[C:8](=[O:22])[CH2:7][CH2:6]3)[CH2:3]1

참가 물질

4

반응물 2

HCID 24007Selenium DioxideHCID 129518006-Methylideneandrost-4-ene-3,17-dione

생성물 1

HCID 60198Exemestane수율 40.3%

시약·촉매·용매 1

HCID 6386tert-Butanol용매

실험 절차

A mixture of 6-methylenandrost-4-ene-3,17-dione (0.50 g), selenium dioxide (0.50 g) and t-butylalcohol (200 ml) was heated to reflux under nitrogen for about 30 hours. The cooled solution was filtered and then evaporated to dryness under reduced pressure. The residue was taken up in ethyl acetate (100 ml), treated with charcoal and washed consecutively with water, ammonium sulfide solution, cold 17% ammonium hydroxide, cold dilute hydrochloric acid, water, dried with sodium sulfate and finally evaporated to dryness. The crude product was chromatographed as described in example 1 to yield 0.20 g of pure 6-methylenandrosta-1,4-diene-3,17-dione, m.p. 188°-191° C.

후처리

  1. temperaturewas heated
  2. temperatureto reflux under nitrogen for about 30 hours
  3. filtrationThe cooled solution was filtered
  4. customevaporated to dryness under reduced pressure
  5. additiontreated with charcoal
  6. washwashed consecutively with water, ammonium sulfide solution, cold 17% ammonium hydroxide, cold dilute hydrochloric acid, water
  7. dry with materialdried with sodium sulfate
  8. customfinally evaporated to dryness
  9. customThe crude product was chromatographed

출처 및 근거

ORD 기록
ord-ede5a1987d044f01a6811df98854f5b2
출처 데이터셋
uspto-grants-1989_02
특허 번호
US04808616

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