Azolium salts as effective catalysts for benzoin condensation and related reactions

Heterocycles

Volumn 43, Issue 3, 1996, Pages 509-512

  Miyashita, Akira ^a   Suzuki, Yumiko ^a   Kobayashi, Motoi ^a   Kuriyama, Naomi ^a   Higashino, Takeo ^a  

^a UNIVERSITY OF SHIZUOKA   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000181676     PISSN: 03855414     EISSN: None     Source Type: Journal    
DOI: 10.3987/COM-95-7311     Document Type: Article

References (26)

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17. The azolium salts and the azinium salts described in this paper were prepared by treatment of the corresponding heteroarenes with methyl iodide.
18. 3.
19. It was reported that the benzothiazolium salt (12) behaves as an effective catalyst in benzoin condensation; B. Lachmann, H. Steinmaus, and H. W. Wanzlick, Tetrahedron, 1971, 27, 4085. But, under our conditions, we could not obtaine benzoin (2).
20. 3.
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26. 6) ppm: 3; 10.25, 4; 9.70, 12; 10.66, 1,3-dimethylimidazolium iodide; 9.20, 1,3-dimethylbenzimidazolium iodide; 9.85, 3-methylthiazolium iodide; 10.20.