2,6-Lutidine → 17-Ethyl-1-hydroxy-12-[2'-(4"-(tert-butyldimethyl-silyloxy)-3"-methoxycyclohexyl)-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

HRID 2226769Notes

Reaction equation

HRID 2226769 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]([CH3:53])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([OH:50])[CH:46]([O:51][CH3:52])[CH2:45]2)[CH:7]([CH3:54])[CH2:6][CH2:5][C:4]1=[O:55])[CH3:2].N1C(C)=CC=CC=1C.FC(F)(F)S(O[Si:70]([C:73]([CH3:76])([CH3:75])[CH3:74])([CH3:72])[CH3:71])(=O)=O>C(Cl)Cl.C(OCC)(=O)C>[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]([CH3:53])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([O:50][Si:70]([C:73]([CH3:76])([CH3:75])[CH3:74])([CH3:72])[CH3:71])[CH:46]([O:51][CH3:52])[CH2:45]2)[CH:7]([CH3:54])[CH2:6][CH2:5][C:4]1=[O:55])[CH3:2]

Participants

6

Reactant 3

HCID 79372,6-LutidineHCID 123564tert-Butyldimethylsilyl trifluoromethanesulphonateHCID 5726283317-Ethyl-1-hydroxy-12-[2'-(4"-hydroxy-3"-methoxycyclo-hexyl)-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

Product 1

HCID 5722858217-Ethyl-1-hydroxy-12-[2'-(4"-(tert-butyldimethyl-silyloxy)-3"-methoxycyclohexyl)-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

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 17-ethyl-1-hydroxy-12-[2'-(4"-hydroxy-3"-methoxycyclohexyl)-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 (200 mg) in dry methylene chloride (3 ml) was added an excess of 2,6-lutidine (45 μl) and the mixture was stirred at room temperature. After 10 minutes, tert-butyldimethylsilyl trifluoromethane-sulfonate (64 μl) was added by syringe. After 15 minutes the reaction mixture was diluted with ethyl acetate, extracted from saturated bicarbonate, washed with brine and the organic phase dried over magnesium sulfate. Removal of solvent in vacuo and flash chromatography on silica gel (ethyl acetate: hexane (1:2)+1% methanol) gave the title compound (235 mg).

Workup

  1. extractionextracted from saturated bicarbonate
  2. washwashed with brine
  3. dry with materialthe organic phase dried over magnesium sulfate
  4. customRemoval of solvent in vacuo and flash chromatography on silica gel (ethyl acetate: hexane (1:2)+1% methanol)

Sources & evidence

ORD record
ord-87da048612254a789e4c7140b53bbfbc
Source dataset
uspto-grants-1994_09
Patent number
US05349061

Reaction notes

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