Journal
TETRAHEDRON LETTERS
Volume 42, Issue 32, Pages 5355-5357Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(01)01007-3
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The difference in nucleophilicity between the amines of p-aminobenzylamine can be used to synthesize dendrimers based on melamine using a convergent, orthogonal approach. The resulting molecules comprise groups that donate and accept hydrogen-bonds, limiting synthetic accessibility due to intermolecular aggregation. Dendrons with molecular weights exceeding 10 kDa can be prepared by this strategy, but yields drop off significantly at the highest generation (D5) due to difficulties in purification. The addition of Cu(II) reduces the extent of aggregation as evident in SEC traces. UV-vis spectroscopy confirms recognition. (C) 2001 Elsevier Science Ltd. All rights reserved.
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