Electron transfer processes. 53. Homolytic alkylation of enamines by

J. Org. Chem. 1991,56,3415-3479 The results presented here show that a range of fenestranes with fourfold bridgehead substitution has become synthetically accessible. %e NMR data clearly reveal that the barrier to conformational interconversion, and thus the unfavorable steric and, probably, dipolar interactions, increase in the order F, OH