Potassium Cyanide → tert-butyl (3RS,4RS)-4-(4-cyano-phenyl)-3-hydroxy-piperidine-1-carboxylate

HRID 1858591

反応式

HRID 1858591 の反応式
[C-:1]#[N:2].[K+].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.Br[C:24]1[CH:29]=[CH:28][C:27]([CH:30]2[CH2:35][CH2:34][N:33]([C:36]([O:38][C:39]([CH3:42])([CH3:41])[CH3:40])=[O:37])[CH2:32][CH:31]2[OH:43])=[CH:26][CH:25]=1>C(#N)C.[Zn].C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.[Ni](Br)Br>[C:1]([C:24]1[CH:29]=[CH:28][C:27]([CH:30]2[CH2:35][CH2:34][N:33]([C:36]([O:38][C:39]([CH3:42])([CH3:41])[CH3:40])=[O:37])[CH2:32][CH:31]2[OH:43])=[CH:26][CH:25]=1)#[N:2]

参加物

7

反応物 3

HCID 9032Potassium CyanideHCID 11776TriphenylphosphineHCID 54537313tert-butyl (3RS,4RS)-4-(4-bromophenyl)-3-hydroxy-piperidine-1-carboxylate

生成物 1

HCID 54237291tert-butyl (3RS,4RS)-4-(4-cyano-phenyl)-3-hydroxy-piperidine-1-carboxylate収率 56%

試薬・触媒・溶媒 3

HCID 23994Zinc触媒HCID 11050914NiBr2(PPh3)2触媒HCID 6342Acetonitrile溶媒

反応条件

温度
60 °C

実験手順

A suspension of 20 mg (0.30 mmol) of activated zinc powder, 76 mg (1.17 mmol) of potassium cyanide, 52 mg (0.20 mmol) of triphenylphosphine and 74 mg (0.10 mmol) of bis(triphenylphosphine)-nickel(II) dibromide in 2 ml of acetonitrile was heated at 60° C. under argon for 5 minutes. 356 mg (1.00 mmol) of tert-butyl (3RS,4RS)-4-(4-bromophenyl)-3-hydroxy-piperidine-1-carboxylate in solid form were added thereto. The green suspension was stirred at 60° C. under argon for 20 hours. The resulting dark brown suspension was filtered over Speedex and the insoluble material was washed with methylene chloride. The filtrate was partitioned between methylene chloride and 5% sodium hydrogen carbonate solution, the organic phase was dried over magnesium sulphate and finally the solvent was removed under reduced pressure. The crude product (416 mg) was purified by chromatography on silica gel with a 1:1 mixture of ethyl acetate and hexane as the eluent. There were obtained 168 mg (56% of theory) of tert-butyl (3RS,4RS)-4-(4-cyano-phenyl)-3-hydroxy-piperidine-1-carboxylate as a colourless solid; MS: 302 (M)+.

後処理

  1. filtrationThe resulting dark brown suspension was filtered over Speedex
  2. washthe insoluble material was washed with methylene chloride
  3. customThe filtrate was partitioned between methylene chloride and 5% sodium hydrogen carbonate solution
  4. dry with materialthe organic phase was dried over magnesium sulphate
  5. customfinally the solvent was removed under reduced pressure
  6. customThe crude product (416 mg) was purified by chromatography on silica gel with a 1:1 mixture of ethyl acetate and hexane as the eluent

出典と根拠

ORDレコード
ord-a3eaff7cd8824200a1038f4866032694
出典データセット
uspto-grants-2000_11
特許番号
US06150526

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