INTRAMOLECULAR OXYGEN RADICAL ADDITIONS TO ALPHA,BETA-UNSATURATED ESTERS - DIASTEREOSELECTIVE TANDEM CYCLOFUNCTIONALIZATION AND HYDROGEN-TRANSFER REACTIONS
Y. Guindon et Rc. Denis, INTRAMOLECULAR OXYGEN RADICAL ADDITIONS TO ALPHA,BETA-UNSATURATED ESTERS - DIASTEREOSELECTIVE TANDEM CYCLOFUNCTIONALIZATION AND HYDROGEN-TRANSFER REACTIONS, Tetrahedron letters, 39(5-6), 1998, pp. 339-342
The efficiency of a tandem process featuring an oxy radical cyclizatio
n and hydrogen transfer reaction of the resultant carbon-based radical
has been demonstrated. This methodology affords 2,3-trans-disubstitut
ed tetrahydrofurans by creating two new contiguous stereogenic centers
with high levels of 1,2-induction in each step. (C) 1997 Elsevier Sci
ence Ltd. All rights reserved.