Stereoselective Synthesis of (<i>Z</i>)- and (<i>E</i>)-Allyl Aryl Sulfides and Selenides from<i>Baylis</i><i>Hillman</i>Acetates under Neutral Conditions Using<i>β</i>-Cyclodextrin in Water
The first example of the stereoselective synthesis of (Z)‐ and (E)‐allylarylsulfides and selenides from BaylisHillman acetates under neutral conditions in H2O by supramolecular catalysis involving β‐cyclodextrin is reported. β‐Cyclodextrin can be recovered and reused. The reaction is very efficient in providing allylarylsulfides and selenides in good‐to‐excellent yields with clean reaction profiles
Regio- and stereoselective syntheses of allylic thioethers under metal free conditions
作者:Pratibha Singh、Rekha Bai、Rakhee Choudhary、Mahesh C. Sharma、Satpal Singh Badsara
DOI:10.1039/c7ra04817c
日期:——
A metal free, regio and stereoselective syntheses of allylic thioethers using allyl iodides and aryl or alkyl disulfides as coupling partners is described. The densely functionalized allyl iodides having different stereochemistry (E & Z) reacted well with a variety of disulfides in a regio and stereoselective manner providing the resulting allyl aryl thioethers in 62–92% yields.
A Mild and Efficient Stereoselective Synthesis of (Z)- and (E)-Allyl Sulfides and Potent Antifungal Agent, (Z)-3-(4-Methoxybenzylidene)thiochroman-4-one from Morita-Baylis-Hillman Acetates
A facile stereoselective synthesis of (Z)- and (E)-allyl sulfides has been accomplished from Morita–Baylis–Hillman acetates in one-pot by treatment with benzene thiol in the presence of catalytic amounts of 15% aqueous NaOH and TBAI in DMSO at room temperature. The method has been applied for the synthesis of (Z)-3-(4-methoxybenzylidene)thiochroman-4-one, a potent antifungal compound.
Stereoselective Cross-Coupling of Baylis–Hillman Acetates with Diphenyl Disulfides and Diselenides Using Palladium Acetate
作者:P. Surendra Reddy、M. Amarnath Reddy、B. Sreedhar、M. V. Basaveswara Rao
DOI:10.1080/00397910903219468
日期:2010.6.25
An efficient method is described for the stereoselective synthesis of diorganyl chalcogenides from a variety of Baylis-Hillman acetates and diaryl chalcogens using palladium catalyst. This reaction is a convenient new method to produce unsymmetrical sulfides and selenides in good yields.