ISOSELECTIVE RELATIONSHIP FOR THE STEREOSELECTIVITY OF THE TRANSFER OF HYDROGEN-ATOMS TO CYCLIC ALKYL RADICALS

An isoselectivity relationship despite variation of two reaction partners was found for H transfer to the radicals 1. The isoselectivity point is characterized by T(iso) = 750 K and (Z)-2/(E)-2 = 0.72 +/- 0.07 (X = O, PhN; R' = Me, n-C6H13, PhCH2, c-C6H11, PhCH(Me); RH = Bu3SnH, PhMe, PhEt, c-C6H12). Thus, control of the selectivity of such product-forming reaction steps is possible by, for example, variation of the beta substituents of the H donor and the reaction temperature.