Aromatische Spirane. 15. Mitt. Darstellung von 2,2′-Spirobi-( s-hydrindacen)-1,1′-dion und von 4,4′-disubstituierten 2,2′-Spirobi-( s-hydrindacenen).

Autor: Neudeck, Horst
Zdroj: Chemical Monthly / Monatshefte für Chemie; 1988, Vol. 119 Issue 5, p625-644, 20p
Abstrakt: The title compound 6 a was prepared by cyclisation of the diacid 4 b. The diester 4 a of 4 b was synthesized by alkylation of 2 with 3 and following Retro- Claisen-reaction. After catalytic reduction of 6 a to 8 a two identical substituents were introduced by Friedel-Crafts-reaction ( 28). By transformation of the acetylgroups several other derivates ( 29-36) could be obtained. The unsymmetrical compounds (e.g. 21) were prepared from 20, whose precurser was the spiroketon 10 a. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz: