An efficient conversion of olefins to ketones was achieved by the use of molecularoxygen and triethylsilane in the presence of a catalytic amount of cobalt(II) complex of porphyrin. The oxidation was accelerated remarkably in alcohols and had chemoselectivity for conjugated olefins.
在催化量的卟啉钴 (II) 络合物存在下,通过使用分子氧和三乙基硅烷,实现了烯烃到酮的有效转化。在醇中氧化显着加速并且对共轭烯烃具有化学选择性。
One-Pot Preparation of Alcohols from Aromatic Olefins and Acrylic Acid Derivatives by Cobalt(II) Porphyrin-Catalyzed Reductive Oxygenation Followed by Reduction with Trimethyl Phosphite
acid derivatives were converted to benzyl alcohols and α-hydroxyalkanoic acid derivatives in good yields by the reductive oxygenation with oxygen and triethylsilane in the presence of a catalytic amount of cobalt(II) porphyrin followed by treating the reaction mixture with trimethyl phosphite.
在催化量的钴 (II) 卟啉存在下,通过氧和三乙基硅烷的还原氧化,各种芳族烯烃和丙烯酸衍生物以良好的收率转化为苯甲醇和 α-羟基链烷酸衍生物,然后用三甲基卟啉处理反应混合物。亚磷酸盐。
First Reference to the Alkoxymetallation of Diisobutylaluminium and Bromomagnesium-2-vinyloxy Ethoxide to the Corresponding (1,3-Dioxolan-2-yl)methyl Organometallics
作者:Peter Maier、Hartmut Redlich
DOI:10.1055/s-2000-6480
日期:2000.2
Diisobutylaluminium and bromomagnesium-2-vinyloxy-ethoxide add at carbonyl compounds in the manner of (1,3-dioxolan-2-yl)methyl organometallics, giving the carbon-carbon addition products. It is assumed that the aluminium and magnesium compounds of 2-vinyloxy-ethoxide are in equilibrium with the corresponding (1,3-dioxolan-2-yl)methide.
The addition of bromomagnesium 2-vinyloxy ethoxide to various aldehydes in the presence of 10 mol% Sc(OTf) 3 provides a broad range of functionalized protected aldol compounds. The enantioselective preparation of these aldols can be achieved via a Swern oxidation–CBS reduction sequence. Use of the dioxolane derived from 2-bromocyclohexanone provides the expected aldol product as the anti diastereoisomer