Copper Phosphoramidite Catalyzed Enantioselective Ring-Opening of Oxabicyclic Alkenes: Remarkable Reversal of Stereocontrol
作者:Fabio Bertozzi、Mauro Pineschi、Franco Macchia、Leggy A. Arnold、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1021/ol026220u
日期:2002.8.1
[GRAPHICS]An unprecedented copper phosphoramidite catalyzed enantioselective alkylative ring-opening reaction of oxabenzonorbornadiene derivatives with dialkylzinc reagents is reported. The reaction shows high levels of ant stereoselectlvity (up to anti/syn >99:1), complementary to the Pd(0)-catalyzed syn-selective ring-opening protocol, allowing a new entry to anti-dihydronaphthols with high enantioselectivity (up to 99% ee).