Helicenes: Chemically Induced Asymmetric Photosyntheses of Helicenes Skeletons
作者:
Y. Cochez,
R. H. Martin,
J. Jespers,
期刊:
Israel Journal of Chemistry
(WILEY Available online 1976)
卷期:
Volume 15,
issue 1‐2
页码: 29-32
ISSN:0021-2148
年代: 1976
DOI:10.1002/ijch.197600007
出版商: WILEY‐VCH Verlag
数据来源: WILEY
摘要:
AbstractA systematic investigation of chemically induced asymmetric photosyntheses has been carried ou in the helicene series. The following points have been examined: the influence of the nature and of the position of the chiral inducing group in the precursor, the influence of the structure of the precursor and the effect of a double induction. The best asymmetric stereoselectivities were obtained: (a) when the photocyclisation gave rise to a helicene skeleton substituted at position 1‐; (b) at position 2‐, when an ester of optically pure 2‐hydroxymethyl[6]helicene was used as the chiral inducing
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