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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2105337Generated: October 31, 2026

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

https://huagongshe.com/reaction/2105337

Reaction equation

Participants

RoleNameHCIDCharge
ReactantTributylphosphineHCID 13831—
Reactant1,1'-(Azodicarbonyl)dipiperidineHCID 73042—
Reactant1-Isopropylpiperidin-4-olHCID 79681—
Reactant(R)-8-hydroxy-4-methyl-3,4-dihydro-2H-pyrazino[1,2-a]indol-1-oneHCID 68465924—
Product(R)-8-(1-isopropylpiperidin-4-yloxy)-4-methyl-3,4-dihydropyrazino[1,2-a]indol-1(2H)-oneHCID 1667961222%

Reaction Steps

The title compound was synthesized in analogy to example 1, from (R)-8-hydroxy-4-methyl-3,4-dihydro-2H-pyrazino[1,2-a]indol-1-one, 1-isopropyl-piperidin-4-ol (commercially available), tributylphosphine and 1,1′-(azodicarbonyl)dipiperidine, to give the desired product as a colorless gum (22%).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07579351B2
Source datasetuspto-grants-2009_08
ORD IDord-cb9384e6558b4526b0311c2e3e6337db
Source noteuspto-grants-2009_08