Piperidine → HCID 58631179, compound

HRID 1520539Notes

Reaction equation

HRID 1520539 reaction equation
[F:1][CH2:2][C@@H:3]1[C@@H:7]([C:8]2[CH:13]=[CH:12][C:11](I)=[CH:10][CH:9]=2)[O:6][C:5]([CH3:16])([CH3:15])[N:4]1[C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18].[C:24]([Si:26]([CH3:29])([CH3:28])[CH3:27])#[CH:25].N1CCCCC1>[Cu]I.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.Cl[Pd]Cl.C1(C)C=CC=CC=1>[F:1][CH2:2][C@@H:3]1[C@@H:7]([C:8]2[CH:13]=[CH:12][C:11]([C:25]#[C:24][Si:26]([CH3:29])([CH3:28])[CH3:27])=[CH:10][CH:9]=2)[O:6][C:5]([CH3:16])([CH3:15])[N:4]1[C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18]

Participants

7

Reactant 3

HCID 8082PiperidineHCID 66111TrimethylsilylacetyleneHCID 73424774(4S,5R)-Tert-butyl 4-(fluoromethyl)-5-(4-iodophenyl)-2,2-dimethyloxazolidine-3-carboxylate

Product 1

HCID 58631179HCID 58631179, compoundYield 88.4%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 6102075Dichlorobis(triphenylphosphine)palladiumCatalystHCID 1140TolueneSolvent

Conditions

Temperature
35 °C

Procedure

To a toluene (40 ml) solution of (4S,5R)-tert-butyl 4-(fluoromethyl)-5-(4-iodophenyl)-2,2-dimethyloxazolidine-3-carboxylate (2.0 g, 4.6 mmols) is added ethynyltrimethylsilane (451 mg, 4.6 mmols), copper (I)iodide (88 mg, 0.46 mmols, 0.1 equivs), Bis(triphenylphosphine)palladium(II)dichloride (165 mg, 0.23 mmols, 0.05 equivs) and piperidine (782 mg, 9.2 mmols, 2 equivs). The mixture is heated in an atmosphere of nitrogen at 35° C. for six hours. The mixture is filtered through a pad of Celite. The pad of Celite is washed with ethylacetate (2×15 ml). The combined organic filtrates were concentrated using rotary evaporation at reduced pressure to give a crude viscous oil. The oil is purified by flash column chromatography (grading from 100% hexanes to 15% EtOAc) to give the title compound (1.65 g): m/z (Cl) 306 ([M+H]+-Boc).

Workup

  1. filtrationThe mixture is filtered through a pad of Celite
  2. washThe pad of Celite is washed with ethylacetate (2×15 ml)
  3. concentrationThe combined organic filtrates were concentrated
  4. customevaporation at reduced pressure
  5. customto give a crude viscous oil
  6. customThe oil is purified by flash column chromatography (grading from 100% hexanes to 15% EtOAc)

Sources & evidence

ORD record
ord-2fb93e4e686c410a85c66d7247d3d269
Source dataset
uspto-grants-2015_07
Patent number
US09073894B2

Reaction notes

Loading…