Ytterbium(III) trifluoromethanesulfonate 

1, 5 g in glass btl

A water-tolerant Lewis acid catalyst¹ recently used in one-pot syntheses of β-lactams,² and in stereocontrolled radical³ and nucleophilic⁴ addition reactions. Catalyzes the synthesis of deoxypenostatin A in a novel, stereoselective, intramolecular Diels-Alder reaction.⁵
Lewis acid catalyst used with a silylated chinchona alkaloid in an asymmetric synthesis of substituted β-lactams from an acid chloride and aryl imine.⁶ Also used to catalyze an aldehyde-ene reaction in a synthesis of the guaiane skeleton.⁷
An important Lewis acid catalyst for a variety of synthetic reactions, including allylborations.^8,9

99.99%

1. Aldrichimica Acta 28, 77, (1995)

2. J. Org. Chem. 61, 8293, (1996) abstract

3. J. Org. Chem. 61, 6090, (1996) abstract

4. Tet. Asym. 7, 1457, (1996)

5. Snider, B.B. Liu, T. J. Org. Chem. 64, 1088, (1999)

6. Tet. Lett. 48, 1657, (2007)

7. Synlett, 3411, (2006)

8. Kennedy, J.W., et al. J. Org. Chem. 69, 4412, (2004) abstract

9. Kobayashi, S. Trans. Met. Org. Synth. 1, 285, (1998)

Structure Index 1, 164:B:4

UN 3261 8/PG 2

3