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Free keywords:
asymmetric synthesis;
chiral auxiliaries;
helical structures;
polymerizations;
TADDOLates
Abstract:
With high asymmetric induction (up to 96 % de) TADDOL-dimethacrylate can be cyclized to an 11-membered monocycle, or obtained as a dimer, a trimer, or a polymer. Enantiomerically pure, isotactic methylmethacrylate oligomers and polymers can be prepared from these by hydrolysis [Eq. (1), R=CHPh2, CPh3, fluorenyl, PhNHCH2CH2NPh, E=Me]. X-ray crystal structure analyses show that the TADDOL-containing polymers occur as M helices with three monomer units per turn.
