A palladium NNC-pincer complex: an efficient catalyst for allylic arylation at parts per billion levels
作者:Go Hamasaka、Fumie Sakurai、Yasuhiro Uozumi
DOI:10.1039/c4cc09726b
日期:——
Allylic arylation of allylic acetates by sodium tetraarylborates in the presence of ppb to ppm (molar) loadings of a palladium NNC-pincer complex catalyst in methanol at 50 °C gave the corresponding arylated products in excellent yields.
PdII-Catalyzed Highly Selective Arylation of Allyl Esters via CH Functionalization of Unreactive Arenes with Retention of the Traditional Leaving Group
作者:Delin Pan、Miao Yu、Wei Chen、Ning Jiao
DOI:10.1002/asia.200900558
日期:2010.5.3
A highlyselective Fujiwara–Moritani oxidative Heck reaction of allyl esters with unreactive arenes via CH bond activation was developed, in which β‐H elimination is highly chemo‐, regio‐ and stereoselective. Moreover, even electron‐deficient arenes are tolerated in this type of CH activation.
Ruthenium(iii)-catalysed phenylselenylation of allyl acetates by diphenyl diselenide and indium(i) bromide in neat: isolation and identification of intermediate
作者:Amit Saha、Brindaban C. Ranu
DOI:10.1039/c0ob00317d
日期:——
A fast and efficient phenylselenylation of allyl acetates by diphenyl diselenide and indium(I) bromide has been achieved in neat under the catalysis of Ru(acac)3. The intermediate complex of diphenyl diselenide and indium has been isolated and identified as a polymeric pentacoordinated In(III) selenolate complex, [In(SePh)3]n.
Integrating Allyl Electrophiles into Nickel‐Catalyzed Conjunctive Cross‐Coupling
作者:Van T. Tran、Zi‐Qi Li、Timothy J. Gallagher、Joseph Derosa、Peng Liu、Keary M. Engle
DOI:10.1002/anie.201915454
日期:2020.4.27
offer exciting possibilities in organic synthesis but remains largely unknown. Herein, we report the use of allyl electrophiles in nickel-catalyzed conjunctive cross-coupling with a non-conjugated alkene and dimethylzinc. The transformation is enabled by weakly coordinating, monodentate aza-heterocycle directing groups that are useful building blocks in synthesis, including saccharin, pyridones, pyrazoles
Transition metal-free activation of allylic acetates toward regioselective S-allylation of thiols
作者:Amit Saha、Brindaban C. Ranu
DOI:10.1016/j.tetlet.2010.02.015
日期:2010.4
Allylic acetates have been used as allylating agents under transition metal-free condition toward an eco-nomical and sustainable regioselective S-allylation of aromatic and aliphatic thiols in the presence of potassium carbonate in DMF. (C) 2010 Elsevier Ltd. All Fights reserved