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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 649321Generated: October 24, 2026

1,4-Dibromobutane → 2-(4-Bromobutyl)-3,4-dihydro-2-(3,4-dimethoxyphenyl)-4-methyl-3-oxo-2H-1,4-benzothiazine

https://huagongshe.com/en/reaction/649321

Reaction equation

Participants

RoleNameHCIDCharge
Reactant1,4-DibromobutaneHCID 8056—
ReactantHCID 14244692HCID 14244692—
Product2-(4-Bromobutyl)-3,4-dihydro-2-(3,4-dimethoxyphenyl)-4-methyl-3-oxo-2H-1,4-benzothiazineHCID 2014303567.2%

Reaction Steps

3,4-Dihydro-2-(3,4-dimethoxyphenyl)-4-methyl-3-oxo-2H-1,4-benzothiazine (5.0 g) and 1,4-dibromobutane (10.3 g) are treated by the similar method as in Example 12 to give 4.8 g (66.9%) of the titled compound.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04739050
Source datasetuspto-grants-1988_04
ORD IDord-1466abe5a8a746fc9ad5ca1adb2bfca9
Source noteuspto-grants-1988_04