Aryl derivatives solid support catalysts

Comparable levels of selectivity (s = 7.6-24) can also be achieved for the KR of a similar range of aryl alkyl sec-alcohols using Yamada s reasonably readily accessed chiral thiazolidine-2-thione-based DMAP 19 (Fig. 8.4) at between 0 °C and rt over 3 to 12 h [100]. The N-(4/-pyridinyl)-a-methylproline derived catalysts 16, and the solid-supported variant 17 (Fig. 8.4) developed by Campbell [95-98]... 

---