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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1296245Generated: November 1, 2026

2-Chloro-4-hydroxybenzoic acid hydrate → (R)-1,3,4,10b-tetrahydro-7-methylthio-pyrazino[2,1-a]isoindol-6(2H)-one hydrochloric acid salt

https://huagongshe.com/reaction/1296245

Reaction equation

Participants

RoleNameHCIDCharge
Reactant2-Chloro-4-hydroxybenzoic acid hydrateHCID 53395443—
Reactant(+/-)-N-(t-butoxycarbonyl)-1,3,4,10b-tetrahydro-7-chloro-9-methoxy-pyrazino[2,1-a]isoindol-6(2H)-oneHCID 68688757—
Reactant(+/-)-N-(t-butoxycarbonyl)-1,3,4,10b-tetrahydro-7-methylthio-pyrazino[2,1-a]isoindol-6(2H)-oneHCID 68691317—
Product(R)-1,3,4,10b-tetrahydro-7-methylthio-pyrazino[2,1-a]isoindol-6(2H)-one hydrochloric acid saltHCID 11402999—

Reaction Steps

Prepared according to procedures described in Examples 59 and 60 with substitution of 2-(methylthio)benzoic acid for 2-chloro-4-hydroxybenzoic acid hydrate in Example 59, Step A, and (±)-N-(t-butoxycarbonyl)-1,3,4,10b-tetrahydro-7-methylthio-pyrazino[2,1-a]isoindol-6(2H)-one (Example 45) for (±)-N-(t-butoxycarbonyl)-1,3,4,10b-tetrahydro-7-chloro-9-methoxy-pyrazino[2,1-a]isoindol-6(2H)-one in Example 60, Step A. MS (ESI) 235.2 (M−Cl).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07244843B2
Source datasetuspto-grants-2007_07
ORD IDord-27724c4bc4ea4b4b81cbc464ac103c5d
Source noteuspto-grants-2007_07