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Allylic boranes optically active

A number of optically active allylic boron compounds have been used, including380 B-allylbis(2-isocaranyl)borane (28),381 E- and Z-crotyl-(/ ,/ )-2,5-dimethylborolanes (29),382... [Pg.923]

Optically active TV-sulfonylamino alcohols derived from D-camphor or norephedrine were found to be efficient chiral ligands for the enantioselective allylboration of iV-silylimines (Equation (170)) 646-648 B-Allyl(diisopinocampheyl)borane allylated iV-diisobutylaluminum imines with 87% ee (Equation (171)).649,650... [Pg.199]

Allylic boranes generally undergo rapid allylic rearrangement, but hydroboration of cyclohexa-1,3-diene with (+)- or (-)-a-iso-pinocamphenylborane (Ipc BH) gives the first example of an optically active allylic borane (109) that is stable towards rearrange-... [Pg.377]

See other pages where Allylic boranes optically active is mentioned: [Pg.20]    [Pg.300]    [Pg.324]    [Pg.422]    [Pg.20]    [Pg.83]   
See also in sourсe #XX -- [ Pg.922 ]



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