Triphenylphosphine → N-(4-Fluoro-2-(2-(trimethylsilyl)ethynyl)benzyl)-3-(benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxamide

HRID 348203Notes

Reaction equation

HRID 348203 reaction equation
[F:1][C:2]1[CH:32]=[CH:31][C:5]([CH2:6][NH:7][C:8]([C:10]2[N:11]=[C:12]3[N:17]([C:18](=[O:28])[C:19]=2[O:20][CH2:21][C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[CH2:16][CH2:15][O:14][C:13]3([CH3:30])[CH3:29])=[O:9])=[C:4](I)[CH:3]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH3:53][Si:54]([C:57]#[CH:58])([CH3:56])[CH3:55]>CN(C)C=O.N1CCCCC1.C(OCC)(=O)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I>[F:1][C:2]1[CH:32]=[CH:31][C:5]([CH2:6][NH:7][C:8]([C:10]2[N:11]=[C:12]3[N:17]([C:18](=[O:28])[C:19]=2[O:20][CH2:21][C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[CH2:16][CH2:15][O:14][C:13]3([CH3:30])[CH3:29])=[O:9])=[C:4]([C:58]#[C:57][Si:54]([CH3:56])([CH3:55])[CH3:53])[CH:3]=1

Participants

9

Reactant 3

HCID 11776TriphenylphosphineHCID 66111TrimethylsilylacetyleneHCID 21070019N-(4-fluoro-2-iodobenzyl)-3-(benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxamide

Product 1

HCID 21070007N-(4-Fluoro-2-(2-(trimethylsilyl)ethynyl)benzyl)-3-(benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxamideYield 63%

Reagents, catalysts & solvents 5

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolventHCID 8082PiperidineSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
50 °C

Procedure

A solution of intermediate 174, N-(4-fluoro-2-iodobenzyl)-3-(benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxamide (0.277 g, 0.49 mmol) in a mixture of N,N-dimethylformamide (3 ml) and piperidine (1.2 ml) was treated under argon with dichlorobis(triphenylphosphine)palladium(II) (0.020 g), triphenylphosphine (0.010 g), copper(1) iodide (0.010 g) followed by (trimethylsilyl)acetylene (0.21 ml, 1.47 mmol). The resulting mixture was sealed and heated at 50° C. for one hour. The reaction mixture was then diluted with ethyl acetate, washed with water and brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. Chromatography of the residue on silica gel (elution gradient of ethyl acetate in hexane) gave 0.164 g (63% yield) of the title material as a light yellow solid. 1HNMR 400 MHz (CDCl3) δ ppm: 0.27 (9H, s, SiCH3), 1.64 (6H, s, 2×CH3), 4.04 (4H, m, 2×CH2), 4.71 (2H, d, J=6.1 Hz=NCH2), 5.32 (2H, s, OCH2), 6.99 (1H, m, aromatic), 7.19 (1H, dd, J=2.6 Hz and J=9.1 Hz, aromatic), 7.3–7.37 (4H, m, aromatics), 7.48–7.51 (2H, m, aromatics), 7.75 (1H, broad t, NH). HRMS (ESI+) calculated for C29H33FN3O4Si [M+H+]: 534.2224. Found: 534.2229.

Workup

  1. customThe resulting mixture was sealed
  2. washwashed with water and brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-ff31ec7d5f27400fa5c8df913882075e
Source dataset
uspto-grants-2007_02
Patent number
US07176196B2

Reaction notes

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