Zn. Li et al., Highly efficient and enantioselective cyclopropanation of styrene with diazoacetates using a new copper-(Schiff-base) catalyst, TETRAHEDR-A, 11(5), 2000, pp. 1157-1163
A new copper-(Schiff-base) complex, derived from (S)-2-amino-1,1-di(3,5-di-
t-butylphenyl)propanol, 2-hydroxy-5-nitrobenzaldehyde and copper acetate mo
nohydrate, was used as an efficient catalyst for the cyclopropanation of st
yrene with diazoacetates, affording ees of up to 98%. (C) 2000 Elsevier Sci
ence Ltd. All rights reserved.