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Communication | Special issue | Vol 11, No. 1, 1978, pp.203-206
Published online, 1st January, 1970
DOI: 10.3987/S(N)-1978-01-0203
Synthesis of 5-Hydroxy-4,5-dihydro-6H-1,3-thizaine-4,4-dicarboxylate Derivatives

Toshihiko Hashimoto and Tetsuo Miyadera*

*Chemical Research Laboratories and Analytical & Metabolic Research Laboratories, Sankyo Co., Ltd., 1-2-58 Hiromachi, Shinagawa-ku, Tokyo 140-8710, Japan

Abstract

Dihydro-1,3-thiazines, the title compounds (IV-VI), were prepared as possible intermediates for cephalosporin synthesis. The process involves a few steps starting from diethyl aminomalonate (I).