, . NOTES ON SCIENTIFIC RESEARCH. 95 
is perhaps a mixture still. With malonic acid, benzylidene crotonaldehyde affords 
benzalcrotonylidene malonic acid, which seems to occur in different variable modi- 
fications. After condensation with pyrouvic acid, benzylidene crotonaldehyde yields 
benzalcrotonylidene pyroracemic acid, the phenylhydrazone of which melts at 175°. 
‘Condensation of benzylidene crotonaldehyde with acetaldehyde furnishes cinnamylidene 
crotonaldehyde, a reddish yellow, odourless body, which melts at 98°. The phenyl- 
hydrazone of cinnamylidene crotonaldehyde decomposes between 182 to 183°; the 
; j 
semicarbazone, at -238°. C, H;-CH:CH-CHO 
Cinnamaldehyde. 
C,Hs-CH: CH: CH:CH- CHO C,;Hs-CH: CH: CH: CH-CH: CH: CHO 
Benzylidene crotonaldehyde. Cinnamylidene crotonaldehyde. 
Ketones. 
Fenchocamphorone. We reported at the time’) on the total synthesis of fencho- 
camphorone, carried out by G. Komppa, as per a short note in the “Original Com- 
munications, 8t" Congress of Applied Chemistry, 1912, Vol. 25, p. 395”. Komppa 
has now published details of. this synthesis, as well as on the oxidation of the ketone 
with Caro’s acid, in the Berliner Berichte?). By treating D-d-fenchocamphorone from 
D-l-fenchene with Caro’s acid, a crude lactone was obtained, which was converted 
into bromoapocamphoric acid by means of hydrobromic acid and glacial acetic acid. 
After treatment with sodium carbonate, bromoapocampholic acid afforded apocampho- 
lide (m. p. 164°), which was identical*) with the apocampholide prepared by total 
synthesis from camphoric acid anhydride. Through this reaction the constitution of 
fenchocamphorone has been determined. . 
An identical D-d-fenchocamphorone is obtained according to Komppa and S. V. 
Hintikka*) from D-l-fenchene (prepared from fenchylamine as indicated by Wallach) 
on treatment with ozone in glacial acetic acid with 16 p.c. unwashed ozone. On de- 
* composing the ozonide on a water-bath, a ketone was formed which, after recovery from 
‘the semicarbazone, melted between 109 and 110°. D-l-fenchene, derived from /-fenchyl 
alcohol by way of fenchyl chloride, yielded on ozonisation an aldehydelike body in 
addition to fenchocamphorone. The same 
reaction products resulted from D-d- CH CH 
fenchene. Besides, from either fenchene wen cH. freon foe ere 
an acid formed, which melted at 70 to C(CH3)2 C(CHs)2 
71° but has not yet been further examined. HiGes )y-e:CH, HC | CO 
The results obtained in the ozonisation CH CH 
process confirm the formula presumed by 
Wallach for fenchene: — Fenchene. ~ > Fenchocamphorone.. 
Santenone. E. Rimini*) continued his investigations of santenone®). He exposed 
synthetic santenone in aqueous-alcoholic solution to the light from the middle of 
March to the middle of November. The resulting liquid gave the reaction with acet- 
aldehyde and when being poured into water, separated an oil which chiefly consisted of 
unaltered santenone. On treating the reaction material with benzenesulphohydroxamic 
acid, a hydroxamic acid, Cy>H,;0.N (m. p. 144 to 145°), was obtained, which after addition 
1) Comp. Report October 1913, 147. — *) Berl. Berichte 47 (1914), 933. — %) Ibidem 44 (1911), 1539. — 
4) Itidem 47 (1914), 936. — *) R. I. Lombardo di Scienze e Lettere; Estr. dei Rend. 47 (1914), 110 (kindly sent 
us by the author); Chem. Zentralbl. 1914, 1. 1426. — *) Comp. Report April 1912, 185; April 1914, 138. 
