期刊
TETRAHEDRON LETTERS
卷 48, 期 11, 页码 2017-2020出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2007.01.058
关键词
hexahelicene; Heck reaction; photodehydrocyclization; helical phosphine; helical alcohol
The synthesis and structural characterization of a new hexahelicene derivative 2 is reported. This compound features a new type of structure bearing a bromine atom and a methoxy group. Suitable crystals of the latter indicate that its conformation closely resembles that of the unsubstituted [6]helicene, whose idealized symmetry is C2. This 3-bromo-14-methoxyhexahelicene was subjected to lithiation/phosphinilation and yielded the new 3-methoxy-14-(diphenylphosphino)hexahelicene 3. (c) 2007 Elsevier Ltd. All rights reserved.
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