Triethylamine → HCID 86634884, compound

HRID 1013004Notes

Reaction equation

HRID 1013004 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[CH:21]([CH2:22][OH:23])[N:20]([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[CH2:19][CH2:18][N:13]3[C:14](=[O:17])[C:15]=2[OH:16])=[O:9])=[CH:4][CH:3]=1.C(N(CC)CC)C.[CH3:40][S:41](Cl)(=[O:43])=[O:42]>C(Cl)(Cl)Cl>[F:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:6][NH:7][C:8]([C:10]2[N:11]=[C:12]3[CH:21]([CH2:22][O:23][S:41]([CH3:40])(=[O:43])=[O:42])[N:20]([C:24]([O:26][C:27]([CH3:29])([CH3:28])[CH3:30])=[O:25])[CH2:19][CH2:18][N:13]3[C:14](=[O:17])[C:15]=2[OH:16])=[O:9])=[CH:31][CH:32]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 67316968HCID 67316968, compound

Product 1

HCID 86634884HCID 86634884, compound

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent

Procedure

To a solution of tert-butyl 2-{[(4-fluorobenzyl)amino]carbonyl}-3-hydroxy-9-(hydroxymethyl)-4-oxo-4,6,7,9-tetrahydro-8H-pyrazino[1,2-a]pyrimidine-8-carboxylate in dry CHCl3, triethylamine (2 eq.) was added and mixture was stirred ten minutes at room temperature. Methanesulfonyl chloride (1.5 eq.) was slowly added and the resulting mixture was aged at room temperature for 1.5 hours to afford tert-butyl 2-{[(4-fluorobenzyl)amino]carbonyl}-3-hydroxy-9-{[(methylsulfonyl)oxy]methyl}-4-oxo-4,6,7,9-tetrahydro-8H-pyrazino[1,2-a]pyrimidine-8-carboxylate as the main product (monitored by LC-MS). MS (ES) C22H27FN4O8S requires 526. Found: 527 (M+H+). The reaction mixture was concentrated under vacuum at 30° C. and the solvent switched to dry acetonitrile. The insoluble material was filtered off and to the filtrated 5 equivalents of N-benzylmethylamine were added. The mixture was warmed at 110° C. upon microwave irradiation for 30 minutes then stirred at room temperature for further 36 hours. The mixture was concentrated by rotary evaporation and the resulting residue, dissolved in the minimum amount of MeOH, was carefully acidified with some drops of glacial acetic acid applied on cation-exchange resin. The resin was washed with MeOH and the crude product was eluted with 1M ammonia in methanol. The pooled eluants were concentrated to dryness under reduced pressure to get tert-butyl 9-{[benzyl(methyl)amino]methyl}-2-{[(4-fluorobenzyl)amino]carbonyl}-3-hydroxy-4-oxo-4,6,7,9-tetrahydro-8H-pyrazino[1,2-a]pyrimidine-8-carboxylate as a brown oil. MS (ES) C29H34FN5O5 requires 551. Found: 552 (M+H+).

Sources & evidence

ORD record
ord-18aafc0fac6d41f0b7285f15505623a6
Source dataset
uspto-grants-2011_07
Patent number
US07981879B2

Reaction notes

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