Electrophilic cyanating agent C1 accomplishes the direct cyanation of β-keto esters and amides without any catalyst and base.
电亲电性氰化试剂C1实现了β-酮酯和酰胺的直接氰化,无需任何催化剂和碱。
Methylhydrazine-induced enantioselective α-hydroxylation of β-keto esters with molecular oxygen catalyzed by hydroquinine
作者:Yakun Wang、Ting Xiong、Qingwei Meng
DOI:10.1016/j.tet.2014.11.029
日期:2015.1
Methylhydrazine-induced α-hydroxylation of β-dicarbonylcompounds was achieved using O2 as the oxygen source. This reaction provides an efficient approach to enantioenriched ɑ-hydroxy β-dicarbonylcompounds, which are valuable substances and widely used in the chemical and pharmaceutical industry. A wide variety of β-keto esters could undergo this oxidation to give the corresponding products in excellent
Rhodium-catalyzed aerobic conversion of 2-diazo-1,3-dicarbonyls to vicinal tricarbonyl compounds and their in-situ stability toward oxidative degradation
作者:Yi-Ting Tsai、Jia-Liang Zhu
DOI:10.1016/j.molstruc.2022.134521
日期:2023.2
Wolff rearrangement via weak interaction with the substrate carbonyl group (ROC=O or RC=O). The reactions of α-diazo-β-ketoesters and 2-diazo-1,3-diketones give the desirable α,β-diketoesters and vic-triketones in 27-78% isolated yields, along with carboxylicacids and/or 2-oxoacids generated by in-situ oxidative C-C single bond cleavage of the former products. Moreover, the bond cleavage process is completely
Formation of δ-Lactones by Cyanide Catalyzed Rearrangement of α-Hydroxy-β-oxoesters
作者:David Kieslich、Jens Christoffers
DOI:10.1021/acs.orglett.0c04157
日期:2021.2.5
δ-Valerolactone derivatives are formed by cyanide-catalyzed ring-transformation of cyclic α-hydroxy-β-oxoesters. This unprecedented reaction defines a new synthetic methodology, and the products are obtained in up to quantitative yields. Several alkyl substitutions as well as different ester residues are tolerated. Furthermore, benzo- and heteroarene-annulated starting materials are converted without