作者:Robert S. Walters、Christina M. Kraml、Neal Byrne、Douglas M. Ho、Qian Qin、Frederick J. Coughlin、Stefan Bernhard、Robert A. Pascal
DOI:10.1021/ja806958x
日期:2008.12.3
small ([alpha]D(25) = -23 and +23 degrees). Computational studies suggest that the latter result is due to presence of a minor conformation of 13 possessing a larger rotation of opposite sign than the major conformation. Both 7 and 13 showed strong circulardichroism and moderately strong circularly polarized luminescence. A byproduct of these syntheses was 9,10,19,21-tetraphenyldiphenanthro[9,10-b:9