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Selective Cross-Acyloin Condensation Catalyzed by Thiazolium Salt II Selective Formation of 1-Hydroxy-2-ones form Formaldehyde and a Variety of Other Aldehydes, and a Proposal for the Possible Mechanism Selective Cross-Acyloin Condensation Catalyzed by Thiazolium Salt II Selective Formation of 1-Hydroxy-2-ones form Formaldehyde and a Variety of Other Aldehydes, and a Proposal for the Possible Mechanism 松本, 利彦 429 マツモト, トシヒコ YOSHIDA, Atsuhiko 3253 TAKAHASHI, Junko 3254 黒崎, 壽一 430 クロサキ, トシカズ INOUE, Shohei 3255 MATSUMOTO, Toshihiko 328 YOSHIDA, Atsuhiko 329 TAKAHASHI, Junko 330 KUROSAKI, Toshikazu 331 INOUE, Shohei 332 The selective cross-acyloin condensation, where 1-hydroxy-2-ones were obtained selectively from formaldehyde and a wide variety of other aldehydes, was achieved by using 3-ethylbenzothiazolium bromide as a catalyst in the presence of triethylamine. The present reaction is expected to afford a novel and facile method for the synthesis of 1-hydroxy-2-ones. A mechanism accounting for the selective formation of 1-hydroxy-2-one was proposed based on the results obtained by examining the reactions between formaldehyde and P-substituted benzaldehydes. It is of much interest in the mechanism that two catalytic species show an inverse selectivity toward aldehydes. 11 KJ00001511926 論文 Article departmental bulletin paper 1987 application/pdf 東京工芸大学工学部紀要 1 10 64 70 The Academic Reports, the Faculty of Engineering, Tokyo Polytechnic University AN00159741 03876055 https://kougei.repo.nii.ac.jp/record/142/files/KJ00001511926.pdf https://kougei.repo.nii.ac.jp/records/142 eng