Substrate control of diastereoselectivity in zirconium (II) mediated enyne cyclizations
作者:Brian L. Pagenkopf、Eric C. Lund、Tom Livinghouse
DOI:10.1016/0040-4020(94)01130-r
日期:1995.4
The reductive cyclization of an extensive series of chiral enynes by Cp2Zr(II) complexes has been examined. In most instances excellent substrate control of cyclization stereochemistry was observed.
On the origin of diastereoselection in the cyclization of enynes on low-valent zirconium centers. Substituent and torsional effects on annulation stereochemistry