Preparation of (-)-(M)-Paracyclophanohexahelicene from (-)-(M)-1,4-Dimethylhexahelicene and the Absolute Configuration of 4-Substituted Paracyclophanes

DOI: 10.1021/jo00323a002

Source and publish data:

Journal of Organic Chemistry p. 1985 - 1987 (1981)

Update date:2022-08-15

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Authors:

Nakazaki, Masao

Yamamoto, Koji

Maeda, Miharu

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Article abstract of DOI:10.1021/jo00323a002

Photocyclization of a cis-trans mixture of the 1,2-diarylethylene precursor 9 gives 1,4-dimethylhexahelicene (10).The levorotatory enantiomer of 10 with M helicity is converted to (-)-(M)-<2.2>paracyclophanohexahelicene (6), which confirms the R configura

Full text of DOI:10.1021/jo00323a002

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