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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1296278Generated: November 3, 2026

N,N-Diethyl 4-bromo-2-chlorobenzamide → (R)-1,3,4,10b-tetrahydro-7-chloro-9-hydroxy-pyrazino[2,1-a]isoindol-6(2H)-one Hydrochloric Acid

https://huagongshe.com/reaction/1296278

Reaction equation

Participants

RoleNameHCIDCharge
ReactantN,N-Diethyl 4-bromo-2-chlorobenzamideHCID 16115931—
Reactant4-bromo-N,N-diethyl-2-(trifluoromethoxy)benzamideHCID 68687835—
ReactantN-(t-butoxycarbonyl)-(+/-)-1,3,4,10b-tetrahydro-9-methoxy-7-trifluoromethoxy-pyrazino[2,1-a]isoindol-6(2H)-oneHCID 68687866—
Product(R)-1,3,4,10b-tetrahydro-7-chloro-9-hydroxy-pyrazino[2,1-a]isoindol-6(2H)-one Hydrochloric AcidHCID 11242816—

Reaction Steps

Prepared according to procedures described in Example 128 Step A with substitution of N-(t-butoxycarbonyl)-(R)-1,3,4,10b-tetrahydro-7-chloro-9-methoxy-pyrazino[2,1-a]isoindol-6(2H)-one, produced by procedures described in example 126 eith the substitution of N,N-diethyl-4-bromo-2-chlorobenzamide for N,N-diethyl-4-bromo-2-trifluoromethoxybenzamide, for N-(t-butoxycarbonyl)-(±)-1,3,4,10b-tetrahydro-9-methoxy-7-trifluoromethoxy-pyrazino[2,1-a]isoindol-6(2H)-one. Followed by the separation of enantiomers according to the procedures described in Example 128 Step D. MS (ESI) 239 (M−Cl).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07244843B2
Source datasetuspto-grants-2007_07
ORD IDord-aa83165687454e1f805ee51432082d6b
Source noteuspto-grants-2007_07