Base-promoted 1,6-conjugate addition of alkylazaarenes to <i>para</i>-quinone methides
作者:Amritha Rayaroth、Rajat Kumar Singh、Kalyanakrishnan A. V.、Krishna Hari、Alagiri Kaliyamoorthy
DOI:10.1039/d0ob00419g
日期:——
1,1,2-Triarylethanes embedded with an azaarene unit were prepared in a single step at ambient temperature via the sodium hexamethyldisilazide mediated 1,6-conjugate addition of unactivated alkylazaarenes on para-quinone methides (p-QMs).
Catalyst- and reagent-free 1,6-hydrophosphonylation of <i>p</i>-quinone methides: a practical approach for the synthesis of diarylmethyl phosphine oxides
作者:Yogesh N. Aher、Amit B. Pawar
DOI:10.1039/c9ob01326a
日期:——
We developed a catalyst-, reagent-, and additive-free protocol with 100% atom economy for the synthesis of diarylmethyl phosphine oxides via 1,6-hydrophosphonylation of p-quinone methides using water as a green solvent. The reaction showed broad scope with excellent functional group tolerance. The practicability of this method was demonstrated by carrying out the reaction on the gram scale whereby
Ammonium chloride-mediated trifluoromethylthiolation of p-quinone methides is reported using inexpensive and bench stable AgSCF3 as a nucleophilic trifluoromethylthiolating (-SCF3) reagent. This method is an efficient strategy for the construction of the benzylic C(sp3)–SCF3 bond to synthesize trifluoromethylthio-diarylmethane derivatives by 1,6-conjugate addition/aromatization under mild reaction
A metal and base-free, operationally simple, and scalable multicomponent approach towards the synthesis of S-diarylmethane dithiocarbamates is reported. A range of structurally and electronically diverse p-quinone methides are shown to react with a variety of amines, and carbon disulfide to furnish corresponding dithiocarbamates in good to excellent yields under mild conditions. Furthermore, p-QMs
Reaction of superoxo Co(III) complexes with 2,6-di--butyl--benzoquinone methides
作者:A. Nishinaga、H. Tomita、Y. Tarumi、T. Matsuura
DOI:10.1016/0040-4039(80)80156-0
日期:1980.1
SuperoxoCo(III) complexes derived from Co(Salpr) and [Co(CN)5]3− reacted with 2,6-di--butyl--benzoquinonemethides to give 2,6-di--butyl--benzoquinone and 2,6-di--butyl-2,5-cyclohexadienonespirooxiranes as the main products, which are considered to result from nucleophilic attack by the superoxo species on the exo double bond of the quinone methides.