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

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
› Author Affiliations
Further Information

Publication History

Received: 13 February 2012

Accepted after revision: 14 March 2012

Publication Date:
26 April 2012 (online)


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.