Dichloroacetic Acid → 3beta-benzoyloxy-21,21-dimethoxy-20-methyl-1alpha-(N-methylcarbamoyl)oxy-7alpha-(methoxycarbonyl)oxypregn-5-ene

HRID 1708804Notes

Reaction equation

[C:1]([O:9][C@H:10]1[CH2:33][C@H:32]([O:34][C:35](=[O:38])[NH:36][CH3:37])[C@@:31]2([CH3:39])[C@@:12](O)([CH:13]=[CH:14][C@@H:15]3[C@@H:30]2[CH2:29][CH2:28][C@@:27]2([CH3:40])[C@H:16]3[CH2:17][CH2:18][C@@H:19]2[CH:20]([CH3:26])[CH:21]([O:24][CH3:25])[O:22][CH3:23])[CH2:11]1)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.ClC(Cl)C(O)=O.[C:48](=[O:53])([O:51]C)[O:49][CH3:50]>>[C:1]([O:9][C@H:10]1[CH2:33][C@H:32]([O:34][C:35](=[O:38])[NH:36][CH3:37])[C@@:31]2([CH3:39])[C:12](=[CH:13][C@@H:14]([O:53][C:48]([O:49][CH3:50])=[O:51])[C@@H:15]3[C@@H:30]2[CH2:29][CH2:28][C@@:27]2([CH3:40])[C@H:16]3[CH2:17][CH2:18][C@@H:19]2[CH:20]([CH3:26])[CH:21]([O:24][CH3:25])[O:22][CH3:23])[CH2:11]1)(=[O:8])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Reactant 3

HCID 6597Dichloroacetic Acid

HCID 12021Dimethyl Carbonate

HCID 678529103beta-benzoyloxy-21,21-dimethoxy-20-methyl-1alpha-(N-methylcarbamoyl)oxypregn-6-en-5alpha-ol

Product 1

HCID 678529553beta-benzoyloxy-21,21-dimethoxy-20-methyl-1alpha-(N-methylcarbamoyl)oxy-7alpha-(methoxycarbonyl)oxypregn-5-ene

Procedure

In 10 ml of dimethyl carbonate was dissolved 350 mg of 3β-benzoyloxy-21,21-dimethoxy-20-methyl-1α-(N-methylcarbamoyl)oxypregn-6-en-5α-ol, followed by addition of 50 mg of dichloroacetic acid, and the mixture was heated in an atmosphere of argon gas for 12 hours. The reaction mixture-was then worked up in the same manner as Example 132 to give 90 mg of 3β-benzoyloxy-21,21-dimethoxy-20-methyl-1α-(N-methylcarbamoyl)oxy-7α-(methoxycarbonyl)oxypregn-5-ene showing the following physical properties.

Workup

temperaturethe mixture was heated in an atmosphere of argon gas for 12 hours

Sources & evidence

ORD record: ord-72acfa35ec394be2b87c7e95136d678d
Source dataset: uspto-grants-1994_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05359055

Reaction notes

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