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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1157689Generated: November 4, 2026

Sulfuric Acid → HCID 68643692, compound

https://huagongshe.com/reaction/1157689

Reaction equation

Participants

RoleNameHCIDCharge
ReactantSulfuric AcidHCID 1118—
ReactantSodium HydroxideHCID 14798—
ReactantPotassium NitrateHCID 24434—
ReactantHCID 68648873HCID 68648873—
ProductHCID 68643692HCID 68643692—

Reaction Conditions

Temperature-7 °C

Reaction Steps

A mixture of 1.04 g (5.0 mmol) 2-methyl-1,2,3,4-tetrahydro-8-methoxycarbonyl-isoquinoline and sulphuric acid is slowly combined at −7° C. with 0.57 g of potassium nitrate, then stirred for 15 min at −7° C. and for 1 h at ambient temperature. Then it is slowly poured onto ice water and made alkaline with NaOH. The crystals precipitated are filtered off and dried. A mixture of regioisomers is obtained.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07807693B2
Source datasetuspto-grants-2010_10
ORD IDord-f78f8559910a47e79c816417e3409f16
Source noteuspto-grants-2010_10