Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5276560 | Tetrahedron Letters | 2007 | 4 Pages |
Abstract
A new approach to the C(7)-C(13) intermediate for the synthesis of phoslactomycin B was investigated. Asymmetric dihydroxylation of the β,γ-unsaturated ester proceeded cleanly to afford the β-hydroxyl-γ-lactone with 97.6% ee, which upon protection as the PMB ether followed by hydride reduction furnished a diol. After selective protection of the prim-OH, oxidation of the sec-OH and chelation-controlled addition of CH2CHMgBr afforded the C(7)-C(11) segment. Later on, the C(11) stereocentre was constructed by the asymmetric transfer hydrogenation using the Noyori catalyst.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Hisato Nonaka, Noriaki Maeda, Yuichi Kobayashi,