Effect of Amino Substituents on the Stereochemical Outcome of the Photo-Arbuzov Rearrangements of 1-Arylethyl Phosphorodiamidites
作者:Worawan Bhanthumnavin、Wesley G. Bentrude
DOI:10.1021/jo040297+
日期:2005.6.1
with radicals 3 in the solvent cage with retained configuration at carbon (40% percent net retention, eq 5). The yield of product 10 is reduced to 54%, and 12a is absent. Similarly, the five-membered ring naphthylethyl analogue, phosphorodiamidite 9 (R/S = 98:2), affords largely (R)-11 with apparent 34 ± 3% net retention. The degree of stereorandomization observed in these systems is higher than was reported