title: Design of a Brønsted acid with two different acidic sites: synthesis and application of aryl phosphinic acid-phosphoric acid as a Brønsted acid catalyst.
abstract: A Brønsted acid with two different acidic sites, aryl phosphinic acid-phosphoric acid, has been synthesized. Its catalytic performance was assessed in the hetero-Diels-Alder reaction of aldehyde hydrates with Danishefsky's diene, achieving high reaction efficiency.
authors.affiliation: Institute for Molecular Science, and SOKENDAI (the Graduate School for Advanced Studies), Okazaki, Aichi 444-8787, Japan. momiyama@ims.ac.jp.
authors.forename: N
authors.initials: N
authors.lastname: Momiyama
authors.affiliation: Cooperative Education Program of IMS with Tohoku University, Japan and Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan. mterada@m.tohoku.ac.jp.
authors.forename: T
authors.initials: T
authors.lastname: Narumi
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan. mterada@m.tohoku.ac.jp and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Terada