Acetic Anhydride → HCID 18650837, compound
Reaction equation
[OH:1][C@@H:2]([CH3:21])[CH2:3][C@@H:4]([CH3:20])[O:5][C:6]1[CH:11]=[CH:10][C:9]([C:12]2[CH:19]=[CH:18][C:15]([C:16]#[N:17])=[CH:14][CH:13]=2)=[CH:8][CH:7]=1.[C:22](OC(=O)C)(=[O:24])[CH3:23].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C(OCC)C>[C:22]([O:1][C@@H:2]([CH3:21])[CH2:3][C@H:4]([CH3:20])[O:5][C:6]1[CH:11]=[CH:10][C:9]([C:12]2[CH:19]=[CH:18][C:15]([C:16]#[N:17])=[CH:14][CH:13]=2)=[CH:8][CH:7]=1)(=[O:24])[CH3:23]Participants
6
Procedure
0.50 g of the (R,S)-4-[4'-(3"-hydroxy-1"-methylbutoxy)phenyl]benzonitrile obtained in the above Example 1 was mixed with 0.12 g of acetic anhydride, 0.51 g of triphenylphosphine and 5 ml of ethyl ether. To the obtained mixture, was added dropwise 0.34 g of diethyl azodicarboxylate under stirring. The obtained mixture was stirred at room temperature for three hours. The triphenylphosphine oxide thus precipitated was filtered and desolvated to thereby give a crude product which was purified by silica gel column chromatography with the use of a mixture of ethyl acetate and n-hexane (1:3) as a developing solvent. Thus 0.18 g of the title compound as obtained.
Workup
- stirringThe obtained mixture was stirred at room temperature for three hours
- customThe triphenylphosphine oxide thus precipitated
- filtrationwas filtered
- customto thereby give a crude product which
- customwas purified by silica gel column chromatography with the use of a mixture of ethyl acetate and n-hexane (1:3) as a developing solvent
Sources & evidence
- ORD record
- ord-67489f3e843048f2ac09ef53a66bd9c5
- Source dataset
- uspto-grants-1993_04
- Patent number
- US05200111
Reaction notes
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