Ethyl Bromide → (R)-2-Ethyl-8-(1-isopropyl-piperidin-4-yloxy)-4-methyl-3,4-dihydro-2H-pyrazino[1,2-a]indol-1-one

HRID 2105366Notes

Reaction equation

[CH:1]([N:4]1[CH2:9][CH2:8][CH:7]([O:10][C:11]2[CH:19]=[CH:18][C:17]3[N:16]4[C@H:20]([CH3:25])[CH2:21][NH:22][C:23](=[O:24])[C:15]4=[CH:14][C:13]=3[CH:12]=2)[CH2:6][CH2:5]1)([CH3:3])[CH3:2].[CH2:26](Br)[CH3:27].[H-].[Na+]>>[CH2:26]([N:22]1[CH2:21][C@@H:20]([CH3:25])[N:16]2[C:17]3[CH:18]=[CH:19][C:11]([O:10][CH:7]4[CH2:8][CH2:9][N:4]([CH:1]([CH3:3])[CH3:2])[CH2:5][CH2:6]4)=[CH:12][C:13]=3[CH:14]=[C:15]2[C:23]1=[O:24])[CH3:27]

Participants

Reactant 3

HCID 6332Ethyl Bromide

HCID 24758Sodium hydride

HCID 16679612(R)-8-(1-isopropylpiperidin-4-yloxy)-4-methyl-3,4-dihydropyrazino[1,2-a]indol-1(2H)-one

Product 1

HCID 68462712(R)-2-Ethyl-8-(1-isopropyl-piperidin-4-yloxy)-4-methyl-3,4-dihydro-2H-pyrazino[1,2-a]indol-1-oneYield 76%

Procedure

The title compound was synthesized in analogy to example 17, from (R)-8-(1-isopropyl-piperidin-4-yloxy)-4-methyl-3,4-dihydro-2H-pyrazino[1,2-a]indol-1-one (example 8), ethyl bromide and sodium hydride, to give the desired product as a colorless oil (76%).

Sources & evidence

ORD record: ord-4e2ec82484a34b23be7822f137981432
Source dataset: uspto-grants-2009_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07579351B2

Reaction notes

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