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2005
Alcohols
Q 0230
31- 091
Remarkably Stable (Me3Al)2·DABCO and Stereoselective Nickel-Catalyzed AlR3
(R: Me, Et) Additions to Aldehydes. — Substrates (I) and (IV) are used for additions
of neat AlR3 to aldehydes. The reaction is performed in the presence of Ni(acac) 2 and
axial-chiral (Rax,S,S)-Feringa ligand. Highest enantioselectivities are achieved for electron-deficient aromatic aldehydes. The reactions of some aliphatic aldehydes (VII)
have to be carried out in the absence of DABCO at lower temperature. — (BISWAS*,
K.; PRIETO, O.; GOLDSMITH, P. J.; WOODWARD*, S.; Angew. Chem., Int. Ed. 44
(2005) 15, 2232-2234; Sch. Chem., Univ. Nottingham, Nottingham NG7 2RD, UK;
Eng.) — S. Adam
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