text.skipToContent text.skipToNavigation

Maximum quantity allowed is 999

Please select the quantity

Stable Lewis Acids in Aqueous Media [Synthetic Reagents]

 The Lewis acid-catalyzed C-C bond forming reactions have been of great interest in organic synthesis. While various kinds of Lewis acid-promoted reactions have been developed, these reactions must be carried out under strict anhydrous conditions. The presence of even a small amount of water stops the reaction, because most Lewis acid immediately react with water rather than the substrates and decompose or deactivate.
 Recently, Kobayashi and co-worker have found that certain metal triflates are stable Lewis acids in aqueous media. The reaction of silyl enol ethers with commercial formaldehyde solution smoothly proceeds in aqueous media by the certain metal triflates, especially Yb(OTf)3 to give the corresponding aldol adducts in high yields. Moreover, the triflates can also be used in organic solvents in many reactions. In all cases, the reaction is completed by only a catalytic amount of the triflate, and the catalyst can be easily recovered after the reaction was completed and can be reused. On the other hand, in asymmetric synthesis, chiral Lewis acid which was prepared by Sc(OTf)3, chiral binaphthol and an amine affords chiral Diels-Alder adduct in the reactions of dienophiles and dienes. Then, the certain metal triflates, especially Yb(OTf)3, Sc(OTf)3, etc. are expected to be useful as new types of Lewis acid catalysts in many organic reactions.
 From the view points of green chemistry, these are also remarkably effective Lewis Acids as non-toxic and nonflammable water can be used as reaction solvent.

Literature

14 Results Found
  • 1(current)
  • 2
View:  List
Product Number T1610
CAS RN 54761-04-5
Purity / Analysis Method: >98.0%(T)

Product Number T1294
CAS RN 54010-75-2
Purity / Analysis Method: >98.0%(T)

Product Number T1921
CAS RN 52093-30-8
Purity / Analysis Method: >98.0%(T)

Product Number T1920
CAS RN 141478-68-4
Purity / Analysis Method: >88.0%(T)

Product Number T1292
CAS RN 34946-82-2
Purity / Analysis Method: >98.0%(T)

Product Number I0778
CAS RN 10025-82-8
Purity / Analysis Method: >99.0%(T)

Product Number T1918
CAS RN 76089-77-5
Purity / Analysis Method: >90.0%(T)

Product Number B6120
CAS RN 2794-60-7
Purity / Analysis Method: >96.0%(W)

Product Number M3356
CAS RN 55120-76-8
Purity / Analysis Method: >95.0%(T)

Product Number T1708
CAS RN 161337-67-3
Purity / Analysis Method: >90.0%(T)

Product Number T1663
CAS RN 144026-79-9
Purity / Analysis Method: >98.0%(T)

Product Number T1293
CAS RN 52093-26-2
Purity / Analysis Method: >98.0%(T)

Product Number:   T1610 | Purity / Analysis Method:   >98.0%(T)

Product Number:   T1294 | Purity / Analysis Method:   >98.0%(T)

Product Number:   T1921 | Purity / Analysis Method:   >98.0%(T)

Product Number:   T1920 | Purity / Analysis Method:   >88.0%(T)

Product Number:   T1292 | Purity / Analysis Method:   >98.0%(T)

Product Number:   I0778 | Purity / Analysis Method:   >99.0%(T)

Product Number:   T1918 | Purity / Analysis Method:   >90.0%(T)

Product Number:   B6120 | Purity / Analysis Method:   >96.0%(W)

Product Number:   M3356 | Purity / Analysis Method:   >95.0%(T)

Product Number:   T1708 | Purity / Analysis Method:   >90.0%(T)

Product Number:   T1663 | Purity / Analysis Method:   >98.0%(T)

Product Number:   T1293 | Purity / Analysis Method:   >98.0%(T)

  • 1(current)
  • 2