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2005
Polyphenylalkane derivatives
Q 0720
Thiazolylalanine-Derived Catalysts for Enantioselective Intermolecular AldeCross-Couplings. — Organocatalyst THI is very efficient in the cou25- 087 hyde—Imine
pling of aldehydes with acylimines derived from tosylamides under action of a base.
Hindered base PMP is found to be optimal for high enantioselectivity of the reaction.
Another crucial point for high enantioselectivity of the products is the optimal reaction
time since product racemization occurs. In several cases, > 98% e.e. is achieved by one
recrystallization of the products. — (MENNEN, S. M.; GIPSON, J. D.; KIM, Y. R.;
MILLER*, S. J.; J. Am. Chem. Soc. 127 (2005) 6, 1654-1655; Dep. Chem., Merkert
Chem. Cent., Boston Coll., Chestnut Hill, MA 02467, USA; Eng.) — Klein
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