ol990188v_si_001.pdf (525.56 kB)
Radical-Based Asymmetric Synthesis: An Iterative Approach to 1, 3, 5, ... (2n + 1) Polyols
journal contribution
posted on 1999-09-04, 00:00 authored by Philip Garner, James T. AndersonA conceptually novel approach to 1, 3, 5, ... (2n + 1) polyols based on iterative stereocontrolled homologation of chiral hydroxyalkyl radicals
is reported. Starting from α-keto ester precursors, the general sequence of (1) ketone reduction, (2) auxiliary attachment, (3) saponification,
(4) Barton esterification, and (5) radical addition provided the two-carbon homologue in 70−80% overall yield. The simplicity and generality of
this iterative strategy for 1, 3, 5, ... (2n + 1) polyol synthesis suggests an attractive alternative for the preparation of molecules containing this
structural motif.
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homologuemoleculeiterative stereocontrolled homologationsequencenovel approachgeneralityalternativeBartonAsymmetricsaponificationattachmentiterative strategypolyolsesterSynthesisimplicitychiral hydroxyalkyl radicalsIterative ApproachesterificationketoPolyolprecursormotifpreparationketonepolyolsynthesis
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