Functionalization of saturated hydrocarbons. 14. Further studies on the mechanism of Gif-type systems
作者:Derek H. R. Barton、Frank Halley、Nubar Ozbalik、Martine Schmitt、Esme Young、Gilbert Balavoine
DOI:10.1021/ja00200a037
日期:1989.8
Reaction photochimique d'[adamantyl-2]-2, [adamantyl-1]-1, cyclohexyl-1 et cyclododecyl-1 dihydro-1,2 pyridinethiones-2 dans l'acide pyridineacetique
反应 photochimique d'[adamantyl-2]-2, [adamantyl-1]-1, cyclohexyl-1 et cyclododecyl-1 dihydro-1,2 pyridinethiones-2 dans l'acide pyridineacetique
The invention of new radical chain reactions. Part VIII. Radical chemistry of thiohydroxamic esters; A new method for the generation of carbon radicals from carboxylic acids
作者:Derek H.R. Barton、David Crich、William B. Motherwell
DOI:10.1016/s0040-4020(01)97173-x
日期:1985.1
by tributylstannane in a radicalchainreaction to furnish nor-alkanes.1 In the absence of the stannane a smooth decarboxylatlive rearrangement occurs to give 2-substituted thiopyridines.1 The radicals present in this reaction provoke with -butylthiol an efficient radicalreaction with formation of nor-alkane and 2-pyridyl--butyl disulphide.1Similarly these carbon radicals can be captured by halogen
Ni-Catalyzed Aryl Sulfide Synthesis through an Aryl Exchange Reaction
作者:Ryota Isshiki、Miki B. Kurosawa、Kei Muto、Junichiro Yamaguchi
DOI:10.1021/jacs.1c04215
日期:2021.7.14
Ni-catalyzed aryl sulfide synthesis through an aryl exchange reaction between aryl sulfides and a variety of aryl electrophiles was developed. By using 2-pyridyl sulfide as a sulfide donor, this reaction achieved the synthesis of aryl sulfides without using odorous and toxic thiols. The use of a Ni/dcypt catalyst capable of cleaving and forming aryl–S bonds was important for the aryl exchange reaction
alcohols, heteroaryl halides, and thiourea has been developed for direct and selective synthesis of heteroaryl thioethers. This method can be easily scaled up to the gram scale and extended to dialkyl thioethers, heteroaryl selenides, benzothiazoles, and some antimycobacterially‐active thioethers. Mechanisticstudies revealed that a by‐product‐promoted in situ C–O activation of alcohols to more reactive
Chloroform as a Hydrogen Atom Donor in Barton Reductive Decarboxylation Reactions
作者:Junming Ho、Jingjing Zheng、Rubén Meana-Pañeda、Donald G. Truhlar、Eun Jung Ko、G. Paul Savage、Craig M. Williams、Michelle L. Coote、John Tsanaktsidis
DOI:10.1021/jo400927y
日期:2013.7.5
decarboxylations and to determine the scope of this process. The results from this study show that hydrogenatomtransferfrom chloroform occurs directly under kinetic control and is aided by a combination of polareffects and quantum mechanical tunneling. Chloroform acts as an effective hydrogenatom donor for primary, secondary, and tertiary alkyl radicals, although significant chlorination was also observed