Enantioselective Synthesis of (<i>E</i>)-δ-Stannyl Homoallylic Alcohols via Aldehyde Allylboration Using α-Stannylallylboranes Generated by Allene Hydroboration Followed by a Highly Diastereoselective 1,3-Boratropic Shift
作者:Ming Chen、Daniel H. Ess、William R. Roush
DOI:10.1021/ja103041u
日期:2010.6.16
A highly enantioselectivesynthesis of (E)-delta-stannyl homoallylicalcohols 4 via aldehyde allylboration reactions of the double-chiral allylborane reagent 2a is reported. Allylborane 2a was generated from the hydroboration of commercially available allenylstannane 1 with ((d)Ipc)(2)BH at -40 to -20 degrees C followed by a kinetically controlled and highly diastereoselective 1,3-boratropic shift