Synthesis 2012; 44(11): 1672-1678
DOI: 10.1055/s-0031-1290948
paper
© Georg Thieme Verlag Stuttgart · New York

Unique Salt Effect on Highly Selective Synthesis of Acid-Labile Terpene and Styrene Oxides with a Tungsten/H2O2 Catalytic System under Acidic Aqueous Conditions

Authors

  • Houjin Hachiya

    a   National Institute of Advanced Industrial Science and Technology (AIST), Central 5 Higashi 1-1-1, Tsukuba, Ibaraki, 305-8565, Japan, Fax: +81(29)8614670   eMail: y-kon@aist.go.jp
  • Yoshihiro Kon*

    a   National Institute of Advanced Industrial Science and Technology (AIST), Central 5 Higashi 1-1-1, Tsukuba, Ibaraki, 305-8565, Japan, Fax: +81(29)8614670   eMail: y-kon@aist.go.jp
  • Yutaka Ono

    a   National Institute of Advanced Industrial Science and Technology (AIST), Central 5 Higashi 1-1-1, Tsukuba, Ibaraki, 305-8565, Japan, Fax: +81(29)8614670   eMail: y-kon@aist.go.jp
  • Kiyoshi Takumi

    b   Arakawa Chemical Industries, Ltd., 5, Okubo, Tsukuba, Ibaraki, 300-2611, Japan
  • Naoki Sasagawa

    b   Arakawa Chemical Industries, Ltd., 5, Okubo, Tsukuba, Ibaraki, 300-2611, Japan
  • Yoichiro Ezaki

    b   Arakawa Chemical Industries, Ltd., 5, Okubo, Tsukuba, Ibaraki, 300-2611, Japan
  • Kazuhiko Sato*

    a   National Institute of Advanced Industrial Science and Technology (AIST), Central 5 Higashi 1-1-1, Tsukuba, Ibaraki, 305-8565, Japan, Fax: +81(29)8614670   eMail: y-kon@aist.go.jp
Weitere Informationen

Publikationsverlauf

Received: 13. Februar 2012

Accepted after revision: 14. März 2012

Publikationsdatum:
26. April 2012 (online)


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Abstract

Acid-labile epoxides such as terpene and styrene oxides are effectively synthesized in high yields with good selectivities using tungsten-catalyzed hydrogen peroxide epoxidation in the presence of Na2SO4. The salt effect is thought to originate with the addition of a saturated amount of Na2SO4 to aqueous H2O2; this addition strongly inhibited the undesired hydrolysis of the acid-labile epoxy products, despite the biphasic conditions of substrate as oil phase and H2O2 as acidic aqueous phase.