Eleuthesides and their analogs: IX. Synthesis of C3–C8 eleutheside block from levoglucosenone
作者:A. N. Davydova、B. T. Sharipov、F. A. Valeev
DOI:10.1134/s1070428015100097
日期:2015.10
A chiral building block containing C3–C8 eleutheside carbon chain fragment has been synthesized starting from the 1,2-addition product of methylmagnesiumiodide with levoglucosenone.
Aromatization of 2,2,5-trialkyl-substituted 2,5-dihydrofurans and factors affecting their stabilization
作者:Bulat T. Sharipov、Anna N. Davidova、Farid A. Valeev
DOI:10.1007/s10593-018-2277-z
日期:2018.4
C-2 position involves aromatization via fragmentation involving С–С bond cleavage, resulting in the formation of 2,5-disubstituted furans and carbonyl compounds. 2,5-Dihydrofurans bearing an ester group at the С-2 position were stable. It was found that 2,2,5-trialkyl-substituted 2,5-dihydrofurans containing a hydroxymethyl or carbonyl group in the side chain could aromatize through auto-oxidation
Stereochemical differentiation in the reactions of organometallic reagents with levoglucosenone and some of its dihydro derivatives
作者:I. P. Tsypysheva、F. A. Valeev、E. V. Vasil'eva、L. V. Spirikhin、G. A. Tolstikov
DOI:10.1007/bf02495766
日期:2000.7
The reactions of methylmanganese iodide with levoglucosenone, its dihydro derivative, and 1.6-anhydro-3-deoxy-4-O-methyl-β-d-erythro-hexopyran-2-ulose were found to be highly diastereoselective compared to the reactions of Li-, Mg-, and Cu-based reagents. This specific feature of the manganese reagent is due to the enhanced tendency of manganese for chelation.
与 Li 的反应相比,甲基碘化锰与左旋葡萄糖酮、其二氢衍生物和 1.6-anhydro-3-deoxy-4-O-methyl-β-d-erythro-hexopyran-2-ulose 的反应具有高度的非对映选择性-、Mg 和 Cu 基试剂。锰试剂的这一特性是由于锰螯合的趋势增强。
Synthesis of С(3)–С(8) eleutheside blocks from levoglucosenone
作者:Bulat T. Sharipov、Anna N. Davydova、Farid A. Valeev
DOI:10.1007/s10593-020-02764-8
日期:2020.8
corresponding substituents was carried out on the basis of levoglucosenone. This syntheticmethod eliminates the possibility of aromatization of intermediate and final products to furans due to the formation of the 2,5-dihydrofuran ring at the final steps and the involvement of derivatives protected at the primary hydroxy group in the ring formation reaction.