Table 1. Tricomponent Type II ARC with Linchpin 9^a.

^aReaction conditions: (i) NuLi, Et₂O, −78 °C, 30 min; (ii) electrophile, HMPA/Et₂O (1/10, v/v), −78 °C to rt, 1 h, then rt, 3 h; and/or (iii) 1.0 N aq HCl, overnight.

^bSyn/anti ratio was determined by ¹H NMR analysis of the crude reaction mixture.

^cThe adduct was obtained as a 1:1 mixture of diastereomers.