Solvent‐Free Synthesis of Benzothiazolines in the Presence of Alumina

Mitsuo Kodomari Department of Applied Chemistry, Shibaura Institute of Technology, Koto‐ku, Tokyo, JapanCorrespondence[email protected]

Akihito Satoh Department of Applied Chemistry, Shibaura Institute of Technology, Koto‐ku, Tokyo, Japan

Ryo Nakano Department of Applied Chemistry, Shibaura Institute of Technology, Koto‐ku, Tokyo, Japan

Tadashi Aoyama Department of Materials and Applied Chemistry, College of Science and Technology, Nihon University, Chiyoda‐ku, Tokyo, Japan

Abstract

o‐Aminothiophenol reacted with ketones and β‐keto esters in the presence of alumina under mild and solvent‐free conditions to afford the corresponding benzothiazolines in high yields. Alumina can be reused for subsequent reactions without any loss of the activity.

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Solvent‐Free Synthesis of Benzothiazolines in the Presence of Alumina

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