Journal of Flow Chemistry

, Volume 2, Issue 4, pp 129–134 | Cite as

Regioselectivity Control of the Ring Opening of Epoxides With Sodium Azide in a Microreactor

  • Rajesh Munirathinam
  • Daejune Joe
  • Jurriaan Huskens
  • Willem VerboomEmail author
Full Paper


The reaction of different types of aromatic and aliphatic epoxides with sodium azide to give vicinal azido alcohols was studied in a microreactor with and without pillars in the channels. Dependent on the substrate, the regioselectivity of the ring opening is affected by the used solvent system, viz. acetonitrile-water (sometimes with 10% acetic acid to promote the reactivity of substrates) or t-butyl acetate-water containing Tween80 as a surfactant. For styrene oxide and α-methylstyrene oxide, the α/β regioselectivity changes from 4 to 10 and 1.7 to 6.2, respectively, going from acetonitrile-water to Tween80-containing t-butyl acetate-water. The addition of a surfactant (Tween80) stabilizes the interface in the biphasic t-butyl acetate-water. Pillar-containing microreactors gave better conversions than micro-reactors without pillars and lab scale reactions, probably due to better mixing.


microreactors epoxides regioselectivity 1,2-azido alcohols surfactants 

Supplementary material

41981_2012_20400129_MOESM1_ESM.pdf (137 kb)
Supplementary material, approximately 141 KB.


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Copyright information

© Akadémiai Kiadó 2012

Authors and Affiliations

  • Rajesh Munirathinam
    • 1
  • Daejune Joe
    • 1
  • Jurriaan Huskens
    • 1
  • Willem Verboom
    • 1
    Email author
  1. 1.Laboratory of Molecular Nanofabrication, MESA+Institute for NanotechnologyUniversity of TwenteEnschedeThe Netherlands

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