1,2-Dichloroethane → N-{[7-(4-N-Boc-Piperazin-1-yl)-3,4-dihydro-1(1H)-isoquinolinone-2-yl]acetyl}-3(S)-(ethynyl)-beta-alanine ethyl ester

HRID 862434Notes

Reaction equation

HRID 862434 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[CH:23]=[C:22]3[C:17]([CH2:18][CH2:19][N:20]([CH2:25][C:26](O)=[O:27])[C:21]3=[O:24])=[CH:16][CH:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C1C=CC2N(O)N=NC=2C=1.C(Cl)CCl.Cl.[CH2:44]([O:46][C:47](=[O:53])[CH2:48][C@@H:49]([C:51]#[CH:52])[NH2:50])[CH3:45].CCN(CC)CC>>[CH2:44]([O:46][C:47](=[O:53])[CH2:48][C@@H:49]([C:51]#[CH:52])[NH:50][C:26](=[O:27])[CH2:25][N:20]1[CH2:19][CH2:18][C:17]2[C:22](=[CH:23][C:14]([N:11]3[CH2:10][CH2:9][N:8]([C:6]([O:5][C:1]([CH3:2])([CH3:4])[CH3:3])=[O:7])[CH2:13][CH2:12]3)=[CH:15][CH:16]=2)[C:21]1=[O:24])[CH3:45]

Participants

6

Reactant 5

HCID 111,2-DichloroethaneHCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 11794693[7-(4-t-Butoxycarbonylpiperazin-1-yl)-3,4-dihydro-1(1H)-isoquinolinone-2-yl]acetic acidHCID 86751219Ethyl (3s)-3-aminopent-4-ynoate hydrochloride

Product 1

HCID 86751218N-{[7-(4-N-Boc-Piperazin-1-yl)-3,4-dihydro-1(1H)-isoquinolinone-2-yl]acetyl}-3(S)-(ethynyl)-beta-alanine ethyl ester

Procedure

To a solution of 1-5 (150 mg, 0.39 mmol), HOBT (63 mg, 0.46 mmol) and EDC (111 mg, 0.58 mmol) was added 3(S)-(ethynyl)-β-alanine ethyl ester hydrochloride (1-32) (U.S. Pat. No. 5,272,162; 82 mg, 0.46 mmol) and Et3N (80.7 μl, 0.58 mmol). The mixture was stirred at room temperature under argon for 16 hours and then partitioned between EtOAc and 10% citric acid. The aqueous phase was extracted with EtOAc (×3) and the combined organic layers then washed with saturated aqueous NaHCO3 followed by brine. Removal of the dried (MgSO4) solvent afforded a yellow oil which was purified by column chromatography (silica gel; hexane/EtOAc 1:1) to give 1-33 as an oil. Rf (silica; EtOAc/hexane 2:1) 0.57 ##STR51## N-{[7-(Piperazin-1-yl)-3,4-dihydro-1(1H)-isoquinolinone-2-yl]acetyl}-3(S)-(ethynyl)-β-alanine ethyl ester (1-34)

Workup

  1. custompartitioned between EtOAc and 10% citric acid
  2. extractionThe aqueous phase was extracted with EtOAc (×3)
  3. washthe combined organic layers then washed with saturated aqueous NaHCO3
  4. customRemoval of the
  5. dry with materialdried (MgSO4) solvent
  6. customafforded a yellow oil which
  7. customwas purified by column chromatography (silica gel; hexane/EtOAc 1:1)

Sources & evidence

ORD record
ord-91e6b5b6f12b4de29ffd36bac90f8ea4
Source dataset
uspto-grants-1998_02
Patent number
US05719144

Reaction notes

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