({2-[({(3S,7R,8R,9S)-7-benzyl-8-(hydroxy)-9-methyl-2,6-dioxo-1,5-dioxonan-3-yl}amino)carbonyl]-4-methoxypyridine-3-yl}oxy)methyl acetate → ({2-[({(3S,7R,8R,9S)-7-benzyl-9-methyl-8-[(2-methylprop-2-enyl)oxy]-2,6-dioxo-1,5-dioxonan-3-yl}amino)carbonyl]-4-methoxypyridine-3-yl}oxy)methyl acetate

HRID 1071009Notes

Reaction equation

HRID 1071009 reaction equation
[C:1]([O:4][CH2:5][O:6][C:7]1[C:8]([C:15]([NH:17][C@H:18]2[CH2:26][O:25][C:24](=[O:27])[C@H:23]([CH2:28][C:29]3[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=3)[C@@H:22]([OH:35])[C@H:21]([CH3:36])[O:20][C:19]2=[O:37])=[O:16])=[N:9][CH:10]=[CH:11][C:12]=1[O:13][CH3:14])(=[O:3])[CH3:2]>C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.[Fe+2].C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[C:1]([O:4][CH2:5][O:6][C:7]1[C:8]([C:15]([NH:17][C@H:18]2[CH2:26][O:25][C:24](=[O:27])[C@H:23]([CH2:28][C:29]3[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=3)[C@@H:22]([O:35][CH2:24][C:23]([CH3:28])=[CH2:22])[C@H:21]([CH3:36])[O:20][C:19]2=[O:37])=[O:16])=[N:9][CH:10]=[CH:11][C:12]=1[O:13][CH3:14])(=[O:3])[CH3:2]

Participants

4

Reactant 1

HCID 69801412({2-[({(3S,7R,8R,9S)-7-benzyl-8-(hydroxy)-9-methyl-2,6-dioxo-1,5-dioxonan-3-yl}amino)carbonyl]-4-methoxypyridine-3-yl}oxy)methyl acetate

Product 1

HCID 59989553({2-[({(3S,7R,8R,9S)-7-benzyl-9-methyl-8-[(2-methylprop-2-enyl)oxy]-2,6-dioxo-1,5-dioxonan-3-yl}amino)carbonyl]-4-methoxypyridine-3-yl}oxy)methyl acetateYield 40%

Reagents, catalysts & solvents 2

HCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)CatalystHCID 9811564Bis(dibenzylideneacetone)palladiumCatalyst

Procedure

Compound 6 was prepared in 40% yield using Compound 3 (13.4 g, 25.97 mmol) with dppf (1.44 g, 2.60 mmol), Pd2dba3 (0.59 g, 0.65 mmol) and ethyl methallylcarbonate (4.87 g, 33.8 mmol). Filtration through a bed of silica gel (hexane-acetone) afforded a white solid, which upon recrystallization from toluene gave white tetragonal crystals: m.p.=102-104° C. Spectral data were consistent with the assigned structure.

Workup

  1. filtrationFiltration through a bed of silica gel (hexane-acetone)
  2. customafforded a white solid, which
  3. customupon recrystallization from toluene
  4. customgave white tetragonal crystals

Sources & evidence

ORD record
ord-303b3f6f95ad4cde9e8c8c9edc01328b
Source dataset
uspto-grants-2005_06
Patent number
US06903219B2

Reaction notes

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