Journal fur Praktische Chemie - Chemiker-Zeitung p. 51 - 57 (1998)
Update date:2022-08-03
Topics: Characterization Yield 1,3-oxazines Purification and Isolation
Yamagata, Kenji
Akizuki, Keiko
Yamazaki, Motoyoshi
2-Amino-4,5-dihydro-3-furancarbonitriles (1) react with a slight excess of dibenzoyldiazomethane in the presence of rhodium(II) acetate to give 1,3-oxazin-4-ones (2). With three equivalents of dibenzoyldiazomethane compounds 1 react to afford furo[2,3-b]pyran-3a-carbonitriles (3). Compound 3a was also obtained by treatment of 2a with two equivalents of dibenzoyldiazomethane. Johann Ambrosius Barth 1998.
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Doi:10.1246/cl.1998.203
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