p-Toluenesulfonic acid → HCID 57057054, compound

HRID 1655779Notes

Reaction equation

HRID 1655779 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]([OH:50])[CH:46]([O:51][C:52]3[CH:57]=[CH:56][C:55]([O:58][Si](C(C)(C)C)(C)C)=[CH:54][CH:53]=3)[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]([OH:50])[CH:46]([O:51][C:52]3[CH:53]=[CH:54][C:55]([OH:58])=[CH:56][CH:57]=3)[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 57110967HCID 57110967, compound

Product 1

HCID 57057054HCID 57057054, compoundYield 68.4%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

To a stirred solution of 17-ethyl-1,14-dihydroxy-12-[2'-(3"-(4'"-tert-butyldimethylsilyloxyphenyloxy)-4"-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 (42.5 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 25.7 mg of 17-ethyl-1,14-dihydroxy-12-[2'-(3"-(4'"-hydroxyphenyloxy)-4"-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 anaylsis were 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-b725c6be6a014de8b97172128e722efa
Source dataset
uspto-grants-1993_10
Patent number
US05250678

Reaction notes

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