Synthesis of multivalent carbonate esters by divergent growth of branched carbamates

Citation
Ds. Jones et al., Synthesis of multivalent carbonate esters by divergent growth of branched carbamates, TETRAHEDR L, 42(11), 2001, pp. 2069-2072
Citations number
14
Categorie Soggetti
Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
TETRAHEDRON LETTERS
ISSN journal
00404039 → ACNP
Volume
42
Issue
11
Year of publication
2001
Pages
2069 - 2072
Database
ISI
SICI code
0040-4039(20010311)42:11<2069:SOMCEB>2.0.ZU;2-E
Abstract
Multivalent 4-nitrophenyl (PNP)-carbonate esters were prepared from carbona te ester-containing core groups by a new divergent-growth process. The proc ess doubles the number of PNP-carbonate esters with each round of growth, o r branching, which occurs by reacting an N,N-dihydroxylalkyl amine with a P NP-carbonate ester. The resulting N,N-dihydroxyalkyl carbamate contains two hydroxyl groups for each original PNP-carbonate ester. The hydroxyl groups are converted in situ to PNP-carbonate esters, and the process can be repe ated to provide successive generations of dendrimer-like branched structure s of increased valence. (C) 2001 Published by Elsevier Science Ltd.