Catalytic asymmetric formal [3+2] cycloaddition of isatogens with azlactones to construct indolin-3-one derivatives
The chiral amide-guanidine-catalyzed asymmetric formal [3+2] cycloaddition of isatogens with azlactones is presented. This strategy provided a facile and feasible route to chiral indolin-3-one derivatives bearing two contiguous tetrasubstituted stereocent
2-Iodoisatogens: Versatile intermediates for the synthesis of nitrogen heterocycles
A Cu-promoted cyclization of 2-nitrophenyl iodoacetylenes provides a direct route to a range of 2-iodoisatogens. These compounds represent useful intermediates for the late-stage elaboration of the C-I bond to furnish isatins and a range of alternative heterocyclic products.
Maduli, Elvis J. M.,Edeson, Steven J.,Swanson, Stephen,Procopiou, Panayiotis A.,Harrity, Joseph P. A.
supporting information
p. 390 - 392
(2015/01/30)
Mild and efficient oxy-iodination of alkynes and phenols with potassium iodide and tert-butyl hydroperoxide
An efficient synthesis of 1-iodoalkynes and iodophenols was easily achieved by employing simple KI and TBHP. The reaction does not involve the use of a metal and base combination. A variety of substituted alkynes and phenols were prepared with good to excellent yield.
A palladium-catalyzed synthesis of isatins (1H-Indole-2,3-diones) from 1-(2-haloethynyl)-2-nitrobenzenes
An inherently regiospecific synthesis of isatins (1H-indole-2,3-diones) starting from 1-halo-2-nitrobenzenes is described. The isatins are formed by an intramolecular palladium-catalyzed annulation of 2-(2-haloethynyl)-1-nitrobenzenes via the formation of 2-haloisatogens.
S?derberg, Bj?rn C.G.,Gorugantula, Sobha P.,Howerton, Chet R.,Petersen, Jeffrey L.,Dantale, Shubhada W.
experimental part
p. 7357 - 7363
(2009/12/04)
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