Synthesis and stereochemistry of helical polyurethanes based on 2,2′-dihydroxy-1,1′-binaphthyl and diisocyanatobenzenes

Helical polyurethanes were prepared from 1,4- and 1,3-diisocyanatobenzene and BINOL having various e.e.'s where helix handedness was governed by absolute configuration of major enantiomer of BINOL.