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2005
Halogenated alcohols
P 0120
Fe/Cr- and Co/Cr-Mediated Catalytic Asymmetric 2-Haloallylations of Alde— The asymmetric C—C bond coupling of aldehydes with 2-haloallyl halides
06- 069 hydes.
is efficiently performed using catalysts derived from chiral sulfonamide SOX, CrBr3,
and either iron complex FER or cobalt complex COP. Homoallylic alcohols are
obtained after selective desilylation, since TmsCl is added to the reaction mixture as a
chromium—alkoxide dissociating reagent. In some cases, a catalyst derived from SOX
and CrCl3(THF)3 gives better yields than the Fe/Cr or Co/Cr catalysts. — (KUROSU,
M.; LIN, M.-H.; KISHI*, Y.; J. Am. Chem. Soc. 126 (2004) 39, 12248-12249; Dep.
Chem. Chem. Biol., Harvard Univ., Cambridge, MA 02138, USA; Eng.) — Klein
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