Diene Synthesis by the Reductive Transposition of 1,2-Allenols
作者:Vincent J. Rinaolo、Emily E. Robinson、Abdallah B. Diagne、Scott E. Schaus、Regan J. Thomson
DOI:10.1055/s-0039-1690692
日期:2019.11
Monoalkyl diazene species are versatile intermediates that have enabled many useful synthetic transformations in complex chemical environments. Herein we report the reductive transposition of 1,2-allenols for the direct synthesis of dienes through an alkene walk process.
to manzacidins A and D, here we report a highly efficient catalyticasymmetric α-allenylic alkylation reaction of NH2-unprotected aminoacid esters that is promoted by combined chiral aldehyde/palladium catalysis. Fifty examples of unnatural α,α-disubstituted aminoacid esters are reported with good-to-excellent yields and stereoselectivities. Based on this methodology, a key intermediate leading to