Formal synthesis of ent-dysiherbaine from sulfinyl dihydropyrans by sigmatropic rearrangement and tethered aminohydroxylation
作者:Roberto Fernández de la Pradilla、Nadia Lwoff、Alma Viso
DOI:10.1016/j.tetlet.2007.09.103
日期:2007.11
A stereospecific [2,3]-sigmatropic rearrangement of a sulfinyl dihydropyran, followed by a tethered aminohydroxylation reaction, are the key steps of a formalsynthesis of ent-dysiherbaine from an enantiopure sulfinyl dienol.
Base-Induced Enantioselective Synthesis of Sulfinyl Dihydropyrans
作者:Roberto Fernández de la Pradilla、Mariola Tortosa
DOI:10.1080/10426500590910819
日期:2005.3.2
2-Sulfinyl dienols undergo an efficient base-promoted cyclization to produce sulfinyl dihydropyrans with creation of two asymmetric centers. The configurational stability of the allylic sulfoxide in most cases is noteworthy. Simple manipulations lead to a variety of functionalized tetrahydropyrans.
[2,3]-Sigmatropic Rearrangements of 3-Sulfinyl Dihydropyrans: Application to the Syntheses of the Cores of <i>ent</i>-Dysiherbaine and Deoxymalayamicin A
作者:Roberto Fernández de la Pradilla、Nadia Lwoff、Miguel Ángel del Águila、Mariola Tortosa、Alma Viso
DOI:10.1021/jo8015709
日期:2008.11.21
The [2,3]-sigmatropic rearrangement of a variety of configurationally stable diastereomeric allylic sulfinyl dihydropyrans, produced by base-promoted cyclization of sulfinyl dienols, has been studied. In some cases, the efficient transformation of these substrates into dihydropyranols required an in-depth study of reaction conditions, with the preferred protocol relying on the use of DABCO in warm toluene. This methodology has been applied to the syntheses of the cores of ent-dysiherbaine and deoxymalayamicin A by means of efficient tethered aminohydroxylations.
Sulfoxide-Directed Enantioselective Synthesis of Functionalized Dihydropyrans
作者:Roberto Fernández de la Pradilla、Mariola Tortosa
DOI:10.1021/ol049393n
日期:2004.6.1
The highly selective base-promoted cyclization of enantiopure sulfinyl dienols affords allylic sulfinyl dihydropyrans.