Toward novel polyacetals by transacetalation techniques: dendrimeric diacetals.
[structure: see text] A new approach to polyacetal systems using sequential transacetalation and protection-deprotection techniques was developed for the preparation of macromolecular polyacetals and applied to secure new dendrimers with 2,4,8,10-tetraoxaspiro[5,5]undecane dendrons from pentaerythritol and polyaldehydes. These novel dendrimers, featuring a 1,3,5-benzene-tricarbaldehyde core, viz., the dodecaol (18) and its hexaacetal (19), were prepared, and molecular modeling revealed peculiar dendron convergent structures above the core, due to intramolecular pi-stacking interactions, reinforced by H-bonding of multifunctional termini.
Lemcoff
N Gabriel
NG
School of Chemistry (Raymond and Beverly Sackler Faculty of Exact Sciences), Tel-Aviv University, Ramat-Aviv, 69978 Tel-Aviv, Israel.
Fuchs
Benzion
B
D000080:Acetals / Q000138:chemical synthesis*; D000107:Acetylation; D001672:Biocompatible Materials / Q000138:chemical synthesis; D011108:Polymers / Q000138:chemical synthesis*
D000080:Acetals; D001672:Biocompatible Materials; D011108:Polymers; C016067:polyacetal