Highly Felkin-Anh selective Hiyama additions of chiral allylic bromides to aldehydes. Application to the first synthesis of nephromopsinic acid and its enantiomer
作者:Johann Mulzer、Lars Kattner、Achim R. Strecker、Christian Schroeder、Juergen Buschmann、Christian Lehmann、Peter Luger
DOI:10.1021/ja00011a025
日期:1991.5
The chromium(II)-mediated addition («Hiyama reaction») of the chiral allylic bromides to achiral and chiral aldehydes proceeds with high Felkin-Anh selectivity with respect to the stereocenter at Cγ in the bromide (Table II). By double stereodifferentiation experiments (Tables III/IV) it was shown that the bromide is the stereodominating component in the addition. The methodology was applied to the