Enantiomerically Pure Poly(oxymethylene) Helices: Correlating Helicity with Centrochirality
作者:Simon Eppacher、Gerald Giester、Jan W. Bats、Christian R. Noe
DOI:10.1002/hlca.200890062
日期:2008.4
A first series of enantiomericallypurehelical oligo(formaldehyde)s (=oligo(oxymethylen)s) 16–20 was synthesized. To induce the chiral uniformity of the helices, we used (1S)-2,2-dimethyl-1-phenylpropan-1-ol (14) to generate the end groups at the α and ω terminus (Scheme 6). Propanol 14 was accessible from its racemate by acetal formation with lactol 12 and separation of the diastereoisomers (Scheme 5)