A reductive cyclization strategy was applied to the synthesis of attenol A. This nontraditional approach to the spiroacetal structure illustrated several advantages of the reductive cyclization methodology. The attenol A core was formed in a carbon-carbon bond coupling that gave rise to a previously inaccessible spiroacetal epimer, a new method to synthesize thioketene acetals from a phenyl sulfone was realized, and the configurational stability of a nonanomeric spiroacetal was evaluated. A minor byproduct in the reductive cyclization reaction was identified that for the first time allowed direct evaluation of the stereoselectivity in a reductive cyclization of a dialkyloxy alkyllithium reagent.
Moss, William O.; Jones, Annette C.; Wisedale, Richard, Journal of the Chemical Society. Perkin transactions I, 1992, # 20, p. 2615 - 2624
作者:Moss, William O.、Jones, Annette C.、Wisedale, Richard、Mahon, Mary F.、Molloy, Kieran C.、et al.
DOI:——
日期:——
CRICH, DAVID;RITCHIE, TIMOTHY J., TETRAHEDRON, 44,(1988) N 8, 2319-2328