MnO<sub>2</sub> as a terminal oxidant in Wacker oxidation of homoallyl alcohols and terminal olefins
作者:Rodney A. Fernandes、Gujjula V. Ramakrishna、Venkati Bethi
DOI:10.1039/d0ob01344g
日期:——
PdCl2/CrO3/HCl produced α,β-unsaturated ketonesfrom homoallyl alcohols, the present method provided orthogonally the β-hydroxy-methyl ketones. No overoxidation or elimination of benzylic and/or β-hydroxy groups was observed. The method could be extended to the oxidation of simple terminalolefins as well, to methyl ketones, displaying its versatility. An application to the regioselective synthesis of gingerol is
Versuche zur basenkatalysierten Bicyclisierung von<i>trans</i>-2-Carbäthoxy-6-dodecen-11-on-säure-äthylester
作者:C. A. Grob、R. Moesch
DOI:10.1002/hlca.19590420313
日期:——
Attempts to bicyclize ethyl trans-2-carbethoxy-ll-keto-6-dodecenoic acid (I) to the decalol derivative II by an abnormal MICHAEL reaction are described.
Synthesis of macrolides with N-containing (azine or hydrazide) groups
作者:G. Yu. Ishmuratov、M. P. Yakovleva、G. R. Mingaleeva、R. R. Muslukhov、E. M. Vyrypaev、E. G. Galkin、S. P. Ivanov、A. G. Tolstikov
DOI:10.1007/s10600-009-9406-y
日期:2009.7
Potentially useful 17-, and 22÷25-membered macrolides containing azine or hydrazide groups were synthesized from tetrahydropyran via [1+1]-condensation at room temperature of 7-oxooctyl-7-oxooctanoate, which was obtained via Tishchenko reaction from 7-oxooctanal, with hydrazine hydrate and hydrazides of several dicarboxylic acids.
Palladium-catalyzed remote arylative substitution was achieved for the reaction of arylboronic acids with alkenes possessing a distant acetoxy group via nondissociative chain walking and β-acetoxy elimination.
Additional Nucleophile-Free FeCl<sub>3</sub>-Catalyzed Green Deprotection of 2,4-Dimethoxyphenylmethyl-Protected Alcohols and Carboxylic Acids
mother alcohols and carboxylicacids in excellent yields. Since the present deprotection proceeds via the self-assembling mechanism of the 2,4-DMPM protective group itself to give the hardly-soluble resorcinarene derivative as a precipitate, the rigorous purification process by silica-gel column chromatography was unnecessary and the sufficiently-pure alcohols and carboxylicacids were easily obtained