The Rhodium(II) Acetate-Catalyzed Reaction of Diacyldiazomethanes with Isothiocyanates: Formation of 2-Thioxo-2H-1,3-oxazin-4(3H)-one.
作者:Hirofumi Nakano、Toshikazu Ibata
DOI:10.1246/bcsj.66.238
日期:——
The rhodium(II) acetate-catalyzed reaction of diacyldiazomethanes such as dibenzoyldiazomethane, acetylaroyldiazomethanes, diacetyldiazomethane, and diazodimedone with isothiocyanates gave 2-thioxo-2H-1,3-oxazin-4(3H)-ones through the [4+2] cycloaddition of isothiocyanates with acylketenes which were derived by the Wolff rearrangement of the diacyldiazomethanes. Migration aptitude of methyl and aryl groups was discussed in the reaction of acetylaroyldiazomethanes.
在乙酸铑(II)催化下,二苯甲酰二氮杂环丁烷、乙酰甲酰二氮杂环丁烷、二乙酰二氮杂环丁烷和重氮二甲酮等二乙酰二氮杂环丁烷与异硫氰酸盐发生反应,生成 2-硫酮-2H-1、3-恶嗪-4(3H)-酮、通过异硫氰酸酯与酰基烯烃的[4+2]环加成反应,得到 2-硫酮-2H-1, 3-恶嗪-4(3H)-酮。讨论了甲基和芳基在乙酰芳基二氮杂环甲烷反应中的迁移能力。