2(1H)-Pyrimidinone, tetrahydro-1,3-dimethyl- → HCID 70149074, compound

HRID 1377169Notes

Reaction equation

HRID 1377169 reaction equation
[C:1]([NH:8][C@H:9]([C@H:17]1[O:21][C:20](=[O:22])[CH2:19][CH2:18]1)[CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].C[Si]([N-][Si](C)(C)C)(C)C.[Li+].CN1C(=O)N(C)CCC1.[CH3:42][O:43][C:44]1[CH:45]=[C:46]([CH:49]=[CH:50][C:51]=1[O:52][CH3:53])[CH2:47]I>C1COCC1>[C:1]([NH:8][C@H:9]([C@H:17]1[O:21][C:20](=[O:22])[C@H:19]([CH2:47][C:46]2[CH:49]=[CH:50][C:51]([O:52][CH3:53])=[C:44]([O:43][CH3:42])[CH:45]=2)[CH2:18]1)[CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)([O:3][C:4]([CH3:6])([CH3:7])[CH3:5])=[O:2]

Participants

6

Reactant 4

HCID 816462(1H)-Pyrimidinone, tetrahydro-1,3-dimethyl-HCID 2733832Lithium HexamethyldisilazideHCID 10870461tert-butyl(1S)-1-[(2S)-5-oxotetrahydrofuran-2-yl]-2-phenylethylcarbamateHCID 111617433,4-dimethoxybenzyl iodide

Product 1

HCID 70149074HCID 70149074, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

In analogy with Example 44c), 1 g of 5(S)-[1(S)-(Boc-amino)-2-phenylethyl]dihydrofuran-2-(3H)-one [Example 2b)] in 4 ml of abs. THF is deprotonated (-75° C.) with 6.42 ml of a 1M solution of lithium bis(trimethylsilyl)amide in THF, with the addition of 0.66 ml of DMPU, and alkylated with 911 mg of 3,4-dimethoxybenzyl iodide. Chromatography on silica gel (eluents D, C and J) gives the pure title compound. TLC Rf (C)=0.42. MS M+ =455.

Workup

  1. custom(-75° C.)

Sources & evidence

ORD record
ord-9060cf601aa449478f3f32e2e2f802e5
Source dataset
uspto-grants-1997_09
Patent number
US05663200

Reaction notes

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