p-Toluenesulfonic acid → HCID 57020357, compound

HRID 865564Notes

Reaction equation

HRID 865564 reaction equation
[CH2:1]([CH:3]1[CH:29]=[C:28]([CH3:30])[CH2:27][CH:26]([CH3:31])[CH2:25][CH:24]([O:32][CH3:33])[CH:23]2[O:34][C:19]([OH:38])([CH:20]([CH3:37])[CH2:21][CH:22]2[O:35][CH3:36])[C:18](=[O:39])[C:17](=[O:40])[N:16]2[CH:11]([CH2:12][CH2:13][CH2:14][CH2:15]2)[C:10](=[O:41])[O:9][CH:8]([C:42]([CH3:66])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([O:50][C:51]3[CH:56]=[CH:55][C:54]([O:57][Si](C(C)(C)C)(C)C)=[CH:53][CH:52]=3)[CH:46]([OH:65])[CH2:45]2)[CH:7]([CH3:67])[CH:6]([OH:68])[CH2:5][C:4]1=[O:69])[CH3:2].C1(C)C=CC(S(O)(=O)=O)=CC=1>C(Cl)Cl.CO>[CH2:1]([CH:3]1[CH:29]=[C:28]([CH3:30])[CH2:27][CH:26]([CH3:31])[CH2:25][CH:24]([O:32][CH3:33])[CH:23]2[O:34][C:19]([OH:38])([CH:20]([CH3:37])[CH2:21][CH:22]2[O:35][CH3:36])[C:18](=[O:39])[C:17](=[O:40])[N:16]2[CH:11]([CH2:12][CH2:13][CH2:14][CH2:15]2)[C:10](=[O:41])[O:9][CH:8]([C:42]([CH3:66])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([O:50][C:51]3[CH:52]=[CH:53][C:54]([OH:57])=[CH:55][CH:56]=3)[CH:46]([OH:65])[CH2:45]2)[CH:7]([CH3:67])[CH:6]([OH:68])[CH2:5][C:4]1=[O:69])[CH3:2]

Participants

5

Reactant 2

HCID 6101p-Toluenesulfonic acidHCID 57193466HCID 57193466, compound

Product 1

HCID 57020357HCID 57020357, compoundYield 64.5%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

To a stirred solution of 17-ethyl-1,14-dihydroxy-12-[2'-(4"-(4"'-tert-butyldimethylsilyloxyphenyloxy)-3"-hydroxycyclohexyl)-1'-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9 ]octacos-18-ene-2,3,10,16-tetraone (41.9 mg) in CH2Cl2 (1.5 mL.) at 0° C. was added a solution of p-toluenesulfonic acid in methanol (1.5 mL. of a 10% w/v solution). The mixture was stirred 3H at 0° C. and then 3H at room temperature. The reaction mixture was quenched with saturated aqueous NaHCO3 and extracted 4× with CH2Cl2. The organic extracts were combined and dried over anhydrous Na2SO4. The mixture was filtered and concentrated in vacuo. The product was isolated by preparative TLC on silica gel (eluted with 2:1 hexanes/acetone) affording 23.9 mg of 17-ethyl-1,14-dihydroxy-12-[2'-(4"-(4"'-hydroxyphenyloxy)-3"-hydroxycyclohexyl)-1'-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9 ]octacos-18-ene-2,3,10,16-tetraone. (1H NMR and mass spectral analysis are consistent with the desired structure).

Workup

  1. customat room temperature
  2. customThe reaction mixture was quenched with saturated aqueous NaHCO3
  3. extractionextracted 4× with CH2Cl2
  4. dry with materialdried over anhydrous Na2SO4
  5. filtrationThe mixture was filtered
  6. concentrationconcentrated in vacuo
  7. customThe product was isolated by preparative TLC on silica gel (eluted with 2:1 hexanes/acetone)

Sources & evidence

ORD record
ord-981744293f3c41b9bc9bd4422d068b7e
Source dataset
uspto-grants-1996_10
Patent number
US05565560

Reaction notes

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