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Langgestreckte Moleküle von Dispiro[5.1.5.2]‐Typ
Author(s) -
Boettcher J.,
Hartmann R.,
Vögtle F.
Publication year - 1992
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19921250813
Subject(s) - chemistry , stereochemistry , cis–trans isomerism
Rod‐Like Dispiro[5.1.5.2] Compounds A number of symmetrically and unsymmetrically substituted spiro compounds were synthesized starting from the dispiro[5.1.5.2]trione 1 . The trans‐trans isomers of 2, 3, 6–10 , and 11 were separated from the cis‐cis and cis‐trans isomers. From the trispiro compound 4 derivatives bearing differing substituents were synthesized. The tetraspiro compounds 5 were obtained in one step. Some of the compounds functionalized with flexible sidegroups show narrow liquid‐crystal phases.