Sulfuric acid magnesium salt (1:1) → HCID 56621456, compound
Reaction equation
[CH2:1]([O:8][CH2:9][C@@H:10]1[C@H:14]([CH2:15][C:16](OC)=[O:17])[CH2:13][CH2:12][C@H:11]1[O:20][CH:21]1[CH2:26][CH2:25][CH2:24][CH2:23][O:22]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].C([Al+]CC(C)C)C(C)C.[OH-].[Al+3].[OH-].[OH-].S([O-])([O-])(=O)=O.[Mg+2]>C1(C)C=CC=CC=1.CO>[CH2:1]([O:8][CH2:9][C@@H:10]1[C@H:14]([CH2:15][CH2:16][OH:17])[CH2:13][CH2:12][C@H:11]1[O:20][CH:21]1[CH2:26][CH2:25][CH2:24][CH2:23][O:22]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1Participants
Procedure
In a flow of argon, to a solution cooled to -15° C., of 14.2 g of (1R,2S,3S)-2-benzyloxymethyl-3-methoxycarbonylmethyl-1-(2-tetrahydropyranyloxy)cyclopentane (prepared in Reference Example 3) in 100 ml of dry toluene, 42 ml of a 25% solution of DIBAL (diisobutyl aluminium hydride) in toluene was added dropwise. The mixture was stirred for 2 hrs, and then 20 ml of methanol was added thereto at the same temperature. The solution was stirred at room temperature and, after deposition of aluminum hydroxide, magnesium sulphate was added thereto. The mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography on silica gel using a mixture of cyclohexane and ethyl acetate (2:1) as eluent to give 10.3 g of the title compound having the following physical characteristics.
Workup
- additionwas added dropwise
- stirringThe solution was stirred at room temperature
- filtrationThe mixture was filtered
- concentrationthe filtrate was concentrated under reduced pressure
- customThe residue was purified by column chromatography on silica gel using
- additiona mixture of cyclohexane and ethyl acetate (2:1) as eluent
Sources & evidence
- ORD record
- ord-8fe03f30cc024972aaa61823be0ff984
- Source dataset
- uspto-grants-1985_12
- Patent number
- US04562207
Reaction notes
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