A general, selective synthesis of ω-hydroxyethenyl ethers
作者:E Cabianca、F Chéry、P Rollin、A Tatibouët、O De Lucchi
DOI:10.1016/s0040-4039(01)02195-5
日期:2002.1
A general selective synthesis of β-, γ- and δ-hydroxyethenyl ethers, a class of compounds containing two mutually reactive functionalities positioned at an interacting distance, is based on the reaction of diols with 1,2-bis-(phenylsulfonyl)ethylene (BPSE) followed by reductive elimination of the resulting β-phenylsulfonyl acetals with sodium amalgam.
Reductive opening of carbohydrate phenylsulfonylethylidene (PSE) acetals
作者:Florence Chéry、Elena Cabianca、Arnaud Tatibouët、Ottorino De Lucchi、Thisbe K. Lindhorst、Patrick Rollin
DOI:10.1016/j.carres.2015.09.011
日期:2015.11
carbohydrate-derived phenylsulfonylethylidene (PSE) acetals show a different behavior in reductive desulfonylation than simple symmetrical acetals. Here we have investigated various SET-type reaction conditions in order to open PSE acetals regioselectively and to produce chiral omega-hydroxyethenyl ethers. Whereas sodiumamalgam leads to a mixture of regioisomeric vinyl ethers besides the ethylidene acetal, samarium