Chiral cyclotrisiloxanes.
We have synthesized and separated the enantiomer pair of chiral cyclotrisiloxanes for the first time. Three-blade propeller-like alignment of three phenyl groups in tri(2-butyl)triphenylcyclotrisiloxane induced a positive Cotton effect with (R)-2-butyl group, and a negative effect with (S)-2-butyl substituent.
Tanaka
Ryoji
R
Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu, Japan. polysilane@gmail.com
Kowase
Susumu
S
Unno
Masafumi
M