p-Toluenesulfonic acid → HCID 131718207, compound

HRID 1734337Notes

Reaction equation

HRID 1734337 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]([CH3:70])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([O:50][C:51]3[CH:60]=[CH:59][C:58]4[C:53](=[CH:54][CH:55]=[C:56]([O:61][Si](C(C)(C)C)(C)C)[CH:57]=4)[CH:52]=3)[CH:46]([OH:69])[CH2:45]2)[CH:7]([CH3:71])[CH:6]([OH:72])[CH2:5][C:4]1=[O:73])[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]([CH3:70])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([O:50][C:51]3[CH:60]=[CH:59][C:58]4[C:53](=[CH:54][CH:55]=[C:56]([OH:61])[CH:57]=4)[CH:52]=3)[CH:46]([OH:69])[CH2:45]2)[CH:7]([CH3:71])[CH:6]([OH:72])[CH2:5][C:4]1=[O:73])[CH3:2]

Participants

5

Reactant 2

HCID 6101p-Toluenesulfonic acidHCID 131718208HCID 131718208, compound

Product 1

HCID 131718207HCID 131718207, compoundYield 48%

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"-(6'"-tert-butyldimethylsilyloxynaphth-2-yloxy)-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 (39.8 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 1.25 h at 0° C. and then 1.75 h 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 2× with 2:1 hexanes/acetone) affording 17 mg of 17-ethyl-1,14-dihydroxy-12-[2'-(4"-(6' "-hydroxynaphth-2-yloxy)-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 were consistent with the desired structure).

Workup

  1. custom1.75 h
  2. customat room temperature
  3. customThe reaction mixture was quenched with saturated aqueous NaHCO3
  4. extractionextracted 4× with CH2Cl2
  5. dry with materialdried over anhydrous Na2SO4
  6. filtrationThe mixture was filtered
  7. concentrationconcentrated in vacuo
  8. customThe product was isolated by preparative TLC on silica gel (eluted 2× with 2:1 hexanes/acetone)

Sources & evidence

ORD record
ord-b94856eb7dc14029a2937fc2317d409d
Source dataset
uspto-grants-1996_07
Patent number
US05532248

Reaction notes

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