Table 5.

Influence of Trichloroacetamide on Various Donors and Acceptors^a

^aReactions were conducted with donor (0.12 mmol) and acceptor 2 (0.10 mmol) in Et₂O (0.2 M), 0 °C, 6 h.

^bIsolated yields are reported.

^cThe α:β ratios were determined by ¹H NMR.

^dReactions were conducted with 15 mol % [PhenH]⁺[BF₄]⁻ at 25 °C for 24 h.

^eReactions were conducted with 15 mol % of trichloroacetamide as an additive.

^fThe reaction time was 24 h.

^gAcetonitrile was used as the solvent.

^hReactions were conducted with donor (0.10 mmol) and acceptor 4 (0.40 mmol) in THF (0.2 M) 0 °C, 1 h.

ⁱReactions were conducted with donor (0.12 mmol) and acceptor 6 (0.10 mmol) in Et₂O (0.2 M), 0 °C, 6 h.