960290-60-2Relevant academic research and scientific papers
Synthesis of marine oxylipins constanolactones C and D
Pietruszka, J?rg,Rieche, Anja C. M.,Sch?ne, Niklas
, p. 2525 - 2528 (2007)
After providing the marine oxylipins constanolactones A and B, the next two members of this family were synthesized for the first time. Key to the success was a highly enantioselective and Z-selective reagent-controlled allyl addition (>99%) en route to t
Diastereo- and enantiomerically pure allylboronates: Their synthesis and scope
Pietruszka, Joerg,Schoene, Niklas,Frey, Wolfgang,Grundl, Li
experimental part, p. 5178 - 5197 (2009/07/18)
Allylboronates are highly attractive reagents for allyl additions. Enantiomerically pure, stable reagents with a stereogenic centre in a-position to boron are especially versatile, albeit often difficult to synthesize. Starting from boron-containing allyl alcohols 6 and 7, which are discussed in detail herein, a set of reagents were obtained via [3,3]-sigmatropic rearrangements and consecutive transformations in the side chain. The configurations could be established first by chemical correlation, but also by X-ray crystallography (16, 18, 34, and 39). Allyl additions were performed resulting in the formation of predominantly (Z)-configured homoallylic alcohols (31, 43-45) with high enantiomeric excess. Detailed investigations on the matched-mismatched interaction between the reagents 15/16 (and ent-15/ent-16, respectively) and isopropylidene glyceraldehyde 42 d are presented.
