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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1723613Generated: October 26, 2026

Ethyl 3-Hydroxybutyrate → Ethyl (R)-(+)-4-bromo-3-hydroxybutyrate

https://huagongshe.com/reaction/1723613

Reaction equation

Participants

RoleNameHCIDCharge
ReactantEthyl 3-HydroxybutyrateHCID 62572—
ReactantEthyl 4-bromo-3-hydroxybutanoateHCID 3432354—
ProductEthyl (R)-(+)-4-bromo-3-hydroxybutyrateHCID 1240809599%

Reaction Steps

Instead of ethyl 3-hydroxybutyrate used in Example 1, ethyl 4-bromo-3-hydroxybutyrate (1%, w/v) was used as a reactant and novozyme 435 lipase was used as a biocatalyst. After reaction for 1 hour 40 minutes, ethyl (R)-4-bromo-3-hydroxybutyrate (99% e.e) was obtained at 88.3% conversion.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07485452B2
Source datasetuspto-grants-2009_02
ORD IDord-7ff8bda6f454415db024575f072a4f43
Source noteuspto-grants-2009_02