Lithium diisopropylamide → HCID 15307272、化合物

HRID 369048ノート

反応式

HRID 369048 の反応式
[F:1][CH:2](P(=O)(C1C=CC=CC=1)C1C=CC=CC=1)[F:3].C([N-]C(C)C)(C)C.[Li+].[O:26]1[CH2:31][CH2:30][CH2:29][CH2:28][CH:27]1[O:32][C:33]1[CH:50]=[CH:49][C:48]2[C@@H:47]3[C:38]([C@H:39]4[C@@:43]([CH2:45][CH2:46]3)([CH3:44])[C:42](=O)[CH2:41][CH2:40]4)=[CH:37][CH2:36][C:35]=2[CH:34]=1>O1CCCC1.C(OCC)(=O)C.O>[F:1][C:2]([F:3])=[C:42]1[CH2:41][CH2:40][C@H:39]2[C:38]3[C@H:47]([CH2:46][CH2:45][C@:43]12[CH3:44])[C:48]1[CH:35]=[CH:34][C:33]([O:32][CH:27]2[CH2:28][CH2:29][CH2:30][CH2:31][O:26]2)=[CH:50][C:49]=1[CH2:36][CH:37]=3

参加物

7

反応物 3

HCID 2724682Lithium diisopropylamideHCID 15307271HCID 15307271、化合物HCID 15635908(Difluoromethyl)(oxo)diphenyl-lambda~5~-phosphane

生成物 1

HCID 15307272HCID 15307272、化合物収率 53.6%

試薬・触媒・溶媒 3

HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒2 回HCID 8857Ethyl Acetate溶媒2 回

実験手順

A solution of 3 g of difluoromethyldiphenylphosphine oxide in 85 ml of tetrahydrofuran is slowly mixed with 6 ml of 2 M lithium diisopropylamide solution at a bath temperature of -50° C., and it is stirred for 1 hour. Then, a solution of 1.7 g of 3-tetrahydropyranyloxy-estra-1,3,5(10),7-tetraen-17-one in 42 ml of tetrahydrofuran is slowly added, stirred for 15 minutes, slowly heated at a bath temperature of from -50° C. to 100° C. and refluxed for 2.5 hours. For working-up, it is diluted with ethyl acetate and water, suctioned off on Celite, rewashed with ethyl acetate, washed with water as well as with saturated sodium chloride solution, dried on sodium sulfate, concentrated by evaporation in a vacuum and chromatographed on silica gel with hexane/ethyl acetate/triethylamine. 1.0 g of 17-difluoromethylene-3-tetrahydropyranyloxy-estra-1,3,5(10),7-tetraene is obtained as colorless crystals with a melting point of 83-84° C., [α]D22 =+139.6° (c=0.5% in pyridine).

後処理

  1. stirringstirred for 15 minutes
  2. temperatureslowly heated at a bath temperature of from -50° C. to 100° C.
  3. temperaturerefluxed for 2.5 hours
  4. washwashed with water as well as with saturated sodium chloride solution
  5. customdried on sodium sulfate
  6. concentrationconcentrated by evaporation in a vacuum
  7. customchromatographed on silica gel with hexane/ethyl acetate/triethylamine

出典と根拠

ORDレコード
ord-21df03221aa84d8bac210b96f984d0b3
出典データセット
uspto-grants-2000_10
特許番号
US06136800

反応ノート

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