125868-05-5Relevant articles and documents
Aromatic Spiranes, XVII: Syntheses of Anellated and Substituted 2,2'-Spirobiindane-1-ones and 4,5'-Disubstituted 2,2'-Spirobiindanes
Neudeck, Horst K.
, p. 623 - 642 (2007/10/02)
The spiroketones 9, 16, and 28 were prepared by cyclisation of the carboxylic acids 7c, 13b, and 25c and their acid chlorides, resp. (7d, 13c, and 25d) with polyphosphoric acid (PPA) or SnCl4.The precursors of the latter compounds were synthesized by alky
