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. 2016 Aug 17;5(5):401–433. doi: 10.1002/open.201600043

Table 2.

The activation of glycosyl sulfoxide using different LaIII salts.

No. Ln[OTf]3 (equiv) Activator Solvent Temp [°C] Time Yield [%] α/β
1 Yb (1) Tf2O CH2Cl2 −78→RT 10 h 63 1:2
2 Yb (1) Tf2O CH3CN −40→RT 12 h 63 1:2.8
3 Yb (1) NIS CH2Cl2 RT 20 min 47 1:1.5
4 Yb (1) NIS–TfOH (cat.) CH2Cl2 −78 8.5 h 59 1:2.9
5 Eu (1) Tf2O CH2Cl2 −78→RT 10 h 76 1:1.5
6 Eu (1) Tf2O CH3CN −40→RT 10 h 82 1:4.3
7 Eu (1) NIS CH2Cl2 RT 20 min 48 1:2
8 Eu (1) NIS–TfOH (cat.) CH2Cl2 −78 6 h 64 1:3
9 La (1) Tf2O CH2Cl2 −78→RT 12 h 51 1.7:1