2,6-Lutidine → 17-Ethyl-1,14-dihydroxy-12-[2'-(4"-(tert-butyldimethylsiloxy)-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

HRID 1656282Notes

Reaction equation

HRID 1656282 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]([CH3:52])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([OH:50])[CH:46]([OH:51])[CH2:45]2)[CH:7]([CH3:53])[CH:6]([OH:54])[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]([CH3:52])=[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]([OH:51])[CH2:45]2)[CH:7]([CH3:53])[CH:6]([OH:54])[CH2:5][C:4]1=[O:55])[CH3:2]

Participants

6

Reactant 3

HCID 79372,6-LutidineHCID 123564tert-Butyldimethylsilyl trifluoromethanesulphonateHCID 5720384517-Ethyl-1,14-dihydroxy-12-[2'(3",4"-dihydroxycyclohexyl)-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 5715677017-Ethyl-1,14-dihydroxy-12-[2'-(4"-(tert-butyldimethylsiloxy)-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

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 17-ethyl-1,14-dihydroxy-12-[2'-(3",4"-dihydroxycyclohexyl)-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 (1.0 g) in dry methylene chloride (14 ml) was added 2,6-lutidine (240 μl) and the mixture was stirred at room temperature. After 10 minutes, tert-butyldimethylsilyl trifluoromethanesulfonate (295 μl) was added via syringe. After 15 minutes the reaction mixture was diluted with ethyl acetate, washed with 1N HCl, water, saturated sodium bicarbonate and brine. The organic phase was dried over magnesium sulfate. Removal of the solvent in vacuo and flash chromatography on silica gel (ethyl acetate:hexane (1:3)+1% methanol) gave the title compound (293 mg). 1H NMR consistent with the desired structure.

Workup

  1. washwashed with 1N HCl, water, saturated sodium bicarbonate and brine
  2. dry with materialThe organic phase was dried over magnesium sulfate
  3. customRemoval of the solvent in vacuo and flash chromatography on silica gel (ethyl acetate:hexane (1:3)+1% methanol)

Sources & evidence

ORD record
ord-361f43f5143d43209636c044a9985f99
Source dataset
uspto-grants-1993_10
Patent number
US05252732

Reaction notes

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