Two‐Step Protocol for Iodotrimethylsilane‐Mediated Deoxy‐Functionalization of Alcohols
作者:Yuming Chen、Ru He、Hongjian Song、Guoqing Yu、Chenglin Li、Yuxiu Liu、Qingmin Wang
DOI:10.1002/ejoc.202001602
日期:2021.2.19
protocol for iodotrimethylsilane‐mediated deoxy‐functionalization of primary and secondaryalcohols was described. This protocol involves iodination of alcohol and then replaced by a N, S, or O nucleophile. Compared with traditional Mitsunobureaction, non‐acidic pre‐nucleophiles can be used in this protocol and configuration of alcohols can be retained.
Super-Electron Donors: Bis-pyridinylidene Formation by Base Treatment of Pyridinium Salts
作者:John A. Murphy、Jean Garnier、Stuart R. Park、Franziska Schoenebeck、Sheng-ze Zhou、Andrew T. Turner
DOI:10.1021/ol800134g
日期:2008.3.1
bispyridinium salt 7b affords bispyridinylidene 10, a very powerful neutralorganic two-electron donor [E1/2 (DMF)=-1.13 V vs Ag/AgCl/KCl (sat)], presumably via the pyridinylidene 8. Donor 10 reduces aryliodides and bromides to aryl anions in excellent yield and also reductively cleaves selected phenylalkylsulfones very efficiently.
双吡啶鎓盐7b的去质子化可提供双吡啶鎓亚叉基10,这是一种非常强大的中性有机两电子给体[E1 / 2(DMF)=-1.13 V vs Ag / AgCl / KCl(sat)],大概是通过吡啶基亚苄基8进行的。供体10还原了芳基碘化物和溴化物以优异的收率得到芳基阴离子,并且还非常有效地还原性裂解选定的苯基烷基砜。
Reductive Cleavage of Sulfones and Sulfonamides by a Neutral Organic Super-Electron-Donor (S.E.D.) Reagent
作者:Franziska Schoenebeck、John A. Murphy、Sheng-ze Zhou、Yoshitaka Uenoyama、Yves Miclo、Tell Tuttle
DOI:10.1021/ja074417h
日期:2007.11.1
Sulfones and sulfonamides are reductively cleaved using the neutral and easily prepared organic electron-donor, bis-imidazolylidene 3.
Reductions of Challenging Organic Substrates by a Nickel Complex of a Noninnocent Crown Carbene Ligand
作者:Neil J. Findlay、Stuart R. Park、Franziska Schoenebeck、Elise Cahard、Sheng-ze Zhou、Leonard E. A. Berlouis、Mark D. Spicer、Tell Tuttle、John A. Murphy
DOI:10.1021/ja107703n
日期:2010.11.10
The first crown-tetracarbene complex of Ni(II) has been prepared, and its crystal structure determined. The complex can be reduced by Na/Hg, with an uptake of two electrons. The reduced complex reductively cleaves arenesulfonamides, including those derived from secondary aliphatic amines, and effects Birch reduction of anthracenes as well as reductive cleavage of stilbene oxides. Computational studies show that the orbital that receives electrons upon reduction of the complex 2 is predominantly based on the crown carbene ligand and also that the HOMO of the parent complex 2 is based on the ligand.