76756-20-2Relevant articles and documents
PREPARATION OF (-)-(M)-PARACYCLOPHANO-HEXAHELICENE FROM (-)-(M)-1,4-DIMETHYLHEXAHELICENE AND ABSOLUTE CONFIGURATION OF 4-SUBSTITUTED PARACYCLOPHANES
Nakazaki, Masao,Yamamoto, Koji,Maeda, Miharu
, p. 1553 - 1554 (1980)
Photo-cyclization of a cis-trans mixture of the 1,2-diarylethylene precursor 1 gave 1,4-dimethylhexahelicene (2) whose levorotatory enantiomer with (M)-helicity was converted into (-)-(M)-paracyclophano-hexahelicene (7), mp 236-237 degC, (abs)sub