Stereodivergent Dual Catalytic α‐Allylation of Protected α‐Amino‐ and α‐Hydroxyacetaldehydes
作者:Tobias Sandmeier、Simon Krautwald、Hannes F. Zipfel、Erick M. Carreira
DOI:10.1002/anie.201506933
日期:2015.11.23
Fully stereodivergentdual‐catalyticα‐allylation of protectedα‐amino‐ and α‐hydroxyacetaldehydes is achieved through iridium‐ and amine‐catalyzed substitution of racemic allylic alcohols with chiral enamines generated in situ. The operationally simple method furnishes useful aldehyde building blocks in good yields, more than 99 % ee, and with d.r. values greater than 20:1 in some cases. Additionally