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A new method for the aldol condensation of citral with butanone is described by which the condensation takes place mainly at the methylenc group of the ketone. The mechanism of the reaction is discussed.The condensation of an aldehyde with butanone may take place theoretically in two different ways, i.e. at the methylene group ( I ) or at the methyl 'group (11) of bhe ketone.The literature data show that the ratio between the amounts of the two compounds present in the condensation product is influenced by several factors.Harries and Miifler 3 ) demonstrated the influence of the catalyst; the condensation of benzaldehyde with butanone takes place practically exclusively at the methylene group when the mixture is saturated with hydrogen chloride.Whereas all available literature data 4 ) 6 ) seem to indicate that the I ) The method described in this gaper is the subject of patent applications (e.8.2 ) This paper was presented before the VIIIth Congress0 nazlonale di chimica.

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The root bark of the pomegranate tree (Punica Granafum L.) was first investigated by T a n r e t I ) , who isolated from it several alkaloids, which were named by him pelletierine, Y -pelletierine, methylpelletierine and isopelletierine in honour of the French alkaloid chemist, P e 1 1 e t i e r. Two of T a n r e t ' s alkaloids, pelletierine and methylpelletierine, were optically active: in that respect alone the former difEered from isopelletierine.