Monatshefte fur Chemie p. 623 - 642 (1989)
Update date:2022-08-04
Topics: Syntheses Substituted XVII
Neudeck, Horst K.
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
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