Addition of excess hydrogen peroxide (10 equiv) to a sonicated solution of FeSO^ VHaO (1
equiv) in DMSO containing the JV-(< v-iodoalkyI) indoles 4, 5, 11, and 13 effected oxidative …

A series of bromo-substituted allyl-and diallyl-substituted sulfonamides have been found to
undergofree radical cyclization when treated with tri-rc-butyltin hydride in the presence of …

to these expectations, 2 at least when A is a carbon-centered radical. We now show that a
simple geometric constraint provides a general solution to both of these regiochemical …

Radical cyclizations onto unsaturated systems have become widely used in synthetic
chemistry, and the scope and limitations of such reactions have been the subject of recent …

INT'RMOLECULAR RADICAL CKLIZATION RFACTIONS. AN APPBOACR TO THE INDOLS
ALKALOIDS 4 5 Page 1 Tetrahedron Letters, Vo1.29, No.1, pp 45-48, 1988 0040-4039/88 …

2a, 5.0 5.5 11 (76) 2b (6) 3a, 5.0 5.5 10 (78) 3b (8)" Yields based on GC. GC yields were
confirmed by HPLC isolation on silica gel (94: 4, hexane/ethyl acetate). 6Syringe addition of …

Tetrahedron Letters,Vo1.29,No.50,pp 6657-6660,1988 0040-4039/88 $3.00 + .OO Printed in
Great Britain Pergamon Press plc SYNTHESI Page 1 Tetrahedron Letters,Vo1.29,No.50,pp …

The formation of bicyclic amines by the intramolecular cyclization of 4-aza-6-
methoxycarbonyl-5-hexenyl radicals is described. The direct attachment of a nitrogen atom …

Acylamino radicals 1-3 can be generated by tri-zi-butyltin radical mediated cleavage of a
carbon-sulfur bond. These radicals cyclize with good regio-and stereoselectivity to afford …

The endo cyclization products 4a, 18a, 18b, 25b, and 25c obtained from the reaction of
tributylstannane with the bromoarenes la, 12a, 12b, 22b, and 22c, respectively, are formed …