The long and winding Rhoad: The asymmetriccycloisomerization of nitrogen‐ and oxygen‐bridged 1,6‐enynes proceeded in the presence of a cationic rhodium complex that was coordinated by PPh3 and a chiral diene ligand to afford high yields of chiral 3‐aza‐ and 3‐oxabicyclo[4.1.0]heptenes and high enantioselectivities. TS=4‐toluenesulfonyl, Tf=trifluoromethanesulfonyl.
A Mn(<scp>iii</scp>)/TEMPO-co-mediated tandem azidation–1,2-carbon migration reaction of allylic silyl ethers
作者:Zhi-Min Chen、Zhen Zhang、Yong-Qiang Tu、Ming-Hui Xu、Fu-Min Zhang、Chen-Chen Li、Shao-Hua Wang
DOI:10.1039/c4cc04707a
日期:——
A novel Mn(III)/TEMPO-co-mediated tandem azidation-1,2-carbon migration reaction of allylic silylethers with an unactivated C=C bond has been explored, generating alpha-aryl-alkyl beta-azido ketones with an alpha-quaternary stereocenter.