Boron trifluoride etherate → Cyclododecanecarboxaldehyde

HRID 129531

反応式

HRID 129531 の反応式
[O:1]1[C:3]2([CH2:14][CH2:13][CH2:12][CH2:11][CH2:10][CH2:9][CH2:8][CH2:7][CH2:6][CH2:5][CH2:4]2)[CH2:2]1.B(F)(F)F.CCOCC.CCCCCC.CCCCCC.C(OCC)(=O)C>CCOCC>[CH:3]1([CH:2]=[O:1])[CH2:14][CH2:13][CH2:12][CH2:11][CH2:10][CH2:9][CH2:8][CH2:7][CH2:6][CH2:5][CH2:4]1

参加物

6

反応物 4

HCID 8000Boron trifluoride etherateHCID 8058HexaneHCID 110198001-Oxaspiro[2.11]tetradecaneHCID 21226206Ethyl acetate hexane

生成物 1

HCID 78737Cyclododecanecarboxaldehyde収率 34%

試薬・触媒・溶媒 1

HCID 3283Diethyl Ether溶媒

実験手順

To 5.0 g (25.5 mmol) of 1-oxaspiro[2.11]tetradecane in 50 ml of dry ether at 0° C. is slowly added 1.8 ml (2.1 g, 14.6 mmol) of boron trifluoride etherate. The ice bath is removed and after 15 minutes at room temperature the solution is partitioned between ether and saturated sodium bicarbonate. The organic phase is evaporated to give a clear oil. Flash chromatography over silica gel using a hexane to hexane:ethyl acetate (9:1) gradient give 1.6 g (34%) of a clear oil: NMR (CDCl3) δ 1.28-1.8 (m, 18 H), 2.03 (s, 1 H), 2.42 (m, 1 H), 9.62 (s, 1 H)

後処理

  1. customat 0° C.
  2. customThe ice bath is removed and after 15 minutes at room temperature the solution
  3. customis partitioned between ether and saturated sodium bicarbonate
  4. customThe organic phase is evaporated
  5. customto give a clear oil

出典と根拠

ORDレコード
ord-05973ff767bc42be89cf6d7b85a7564c
出典データセット
uspto-grants-1995_11
特許番号
US05468774

関連ノート

読み込み中…