A novel stereoselective synthesis of (<i>Z</i>)-α-arylsulfanyl-α,β-unsaturated ketones via Stille coupling of (<i>E</i>)-α-arylsulfanylvinylstannanes with acyl halides
Sulfur-Directed Synthesis of Enantiopure Hydroxy 2-Sulfinyl Butadienes
作者:Roberto Fernández de la Pradilla、María Victoria Buergo、María Victoria Martínez、Carlos Montero、Mariola Tortosa、Alma Viso
DOI:10.1021/jo035750g
日期:2004.3.1
The treatment of sulfinyl chlorohydrins with KO-t-Bu in THF generates epoxy vinyl sulfoxides that undergo an efficient base-inducedrearrangement to generate enantiopure hydroxy 2-sulfinyl dienes. This novel process takes place with high chemo- and stereoselectivity. The chirality at sulfur effectively controls the geometry of the trisubstituted alkene.
Wang, Dong; Hao, Wenyan; Cai, Mingzhong, Journal of Chemical Research, 2006, # 12, p. 804 - 806
作者:Wang, Dong、Hao, Wenyan、Cai, Mingzhong
DOI:——
日期:——
Nucleophilic Epoxidation of α‘-Hydroxy Vinyl Sulfoxides
作者:Roberto Fernández de la Pradilla、Jorge Fernández、Pilar Manzano、Paloma Méndez、Julián Priego、Mariola Tortosa、Alma Viso、Martín Martínez-Ripoll、Ana Rodríguez
DOI:10.1021/jo026182s
日期:2002.11.1
The nucleophilic epoxidation of a variety of alpha'-(1-hydroxyalkyl) vinyl sulfones and sulfoxides has been studied. The sulfones give rise to anti oxiranes with modest (E) or excellent (Z) selectivities and in good yields. The (E)-sulfoxides display low reactivity within a reinforcing/nonreinforcing scenario. The use of t-BuOOLi in Et2O allows for a highly syn-selective epoxidation-oxidation. The (Z)-sulfoxides display a remarkably high reactivity under these conditions. The reinforcing (S,Ss) diastereomers (3e-g) yield hydroxy sulfinyl oxiranes with high yields and selectivities. In contrast, the (R,Ss) diastereomers (4e-g) show diminished reactivities and a very substrate-dependent stereochemical outcome. The structure of these oxiranes has been secured by chemical correlations and an X-ray crystal structure.
Sulfinyl-Mediated Stereoselective Overman Rearrangements and Diels–Alder Cycloadditions
作者:Roberto Fernández de la Pradilla、Ignacio Colomer、Alma Viso
DOI:10.1021/ol301139a
日期:2012.6.15
The Overman rearrangement of allylic sulfinyl trichloroacetimidates affords sulfinyl trichloroacetamides with high stereoselectivity and excellent yields. Bis-allylic substrates lead to amido 2-sulfinyl butadiene derivatives in excellent yields, with total chemo- and diastereoselectivity. The Diels-Alder cycloaddition of related dienes is controlled by the sulfoxide moiety.