14838-97-2Relevant academic research and scientific papers
Synthesis and Reactions of 9,10,11-Triptindantrione and Some Other Functionalized Tribenzopropellanes (9H,10H-4b,9a-(Benzenomethano)indenoindenes
Paisdor, Bernd,Kuck, Dietmar
, p. 4753 - 4759 (2007/10/02)
A new and efficient route to the tribenzopropellane 1 (triptindan) and to some interesting derivatives such as 9-triptindanone (13) and 9,10,11-triptindantrione (3) has been developed.The propellane framework of 13 is accessible from 1,3-indandione in only two steps.Triketone 3, a versatile substrate with formal C3v molecular symmetry, is obtained from 13 in two further steps.First examples are presented for reactions of 3 leading to more complex benzoannelated centropolyquinanes (centropolyindans).
Benzoannelated Centropolyquinanes, 3. - Synthesis of Multiply Substituted Triptindans (9H,10H-4b,9a-(Benzenomethano)indenoindenes) with Substituents in their Molecular Cavity
Kuck, Dietmar,Paisdor, Bernd,Gruetzmacher, Hans-Friedrich
, p. 589 - 596 (2007/10/02)
The synthesis of triptindans 13a-e substituted by methoxy and/or methyl groups in positions 2,4,5,7,13, and 15 has been achieved by acid-catalysed cyclodehydration of the corresponding 2,2-dibenzyl-1-indanones 12a-e using Amberlyst 15 and polyphosphoric acid, respectively.Total demethylation of 13a followed by selective deoxygenation of the resulting hexahydroxy compound 14 affords the 4,5,15-trihydroxytriptindan (17) (4, R = OH) bearing the three substituents in its molecular cavity.
