Trifluoromethanesulfonic acid → 17-Ethyl-1,14-dihydroxy-12-[2'-(4"-(2-butynyloxy)-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 373265Notes

Reaction equation

HRID 373265 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].FC(F)(F)S(O)(=O)=O>ClC(Cl)(Cl)C(=N)OCC#CC>[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][CH2:2][C:1]#[C:3][CH3:4])[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

4

Reactant 2

HCID 62406Trifluoromethanesulfonic acidHCID 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 5719515617-Ethyl-1,14-dihydroxy-12-[2'-(4"-(2-butynyloxy)-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 1

HCID 12690962But-2-yn-1-yl 2,2,2-trichloroethanimidateSolvent

Procedure

To a solution of 17-ethyl-1,14-dihydroxy-12-[2'-(4",3"-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 (50 mg in 1.5 ml 33% methylene chloride in cyclohexane) is added 2-butynyl trichloroacetimidate (20 μl neat) and the reagents are allowed to mix for 5 minutes. Trifluoromethanesulfonic acid (2 μl neat) is added slowly via syringe and the mixture stirred at room temperature. After 16 hours the reaction is quenched by the addition of saturated sodium bicarbonate and extracted with ethyl acetate (3×5 ml). The combined organics are washed with brine and dried over magnesium sulfate. Purification of the concentrate by preparative TLC on silica gel gives the title compound.

Workup

  1. additionto mix for 5 minutes
  2. customAfter 16 hours the reaction is quenched by the addition of saturated sodium bicarbonate
  3. extractionextracted with ethyl acetate (3×5 ml)
  4. washThe combined organics are washed with brine
  5. dry with materialdried over magnesium sulfate
  6. customPurification of the
  7. concentrationconcentrate by preparative TLC on silica gel

Sources & evidence

ORD record
ord-ecc1739b92984b89b1211da88a306e37
Source dataset
uspto-grants-1992_11
Patent number
US05162334

Reaction notes

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