Formation of 1,2-dioxacyclohexanes by the reaction of alkenes with tris(2,4-pentanedionato)manganese(III) or with β-ketocarbonyl compounds in the presence of manganese(III) acetate
作者:Shin-ichi Tategami、Takashi Yamada、Hiroshi Nishino、James D. Korp、Kazu Kurosawa
DOI:10.1016/s0040-4039(00)97067-9
日期:1990.1
1-octene, 1-nonene, cyclohexene and cyclooctene with tris(2,4-pentanedionato)manganese(III) in acetic acid at room temperature give 4-acetyl-3-hydroxy-3-methyl- 1,2-dioxacyclohexanes in 8–92 % yields. The reactions of 1,1-disubstituted ethenes with ethyl 3-oxobutanoate or acetoacetanilide in the presence of manganese(III) acetate also give cording 1,2-dioxacyclohexanes in good to moderate yields.
Reactions of 1,1-Disubstituted Alkenes with Acetoacetamides and Molecular Oxygen in the Presence of Manganese(III) Acetate
作者:Chang-Yi Qian、Hiroshi Nishino、Kazu Kurosawa
DOI:10.1246/bcsj.64.3557
日期:1991.12
The reactions of 1,1-disubstituted ethenes with acetoacetamide or N-substituted acetoacetamides, and molecularoxygen in the presence of manganese(III) acetate gave a mixture of c-4- and t-4-carbamoyl-3-methyl-1,2-dioxan-r-3-ols in good yields. Effects of substituents in the alkenes as well as in the carbamoyl group in the acetoacetamides were observed. Stereochemistry and the reactivity of the 4-