resinols, a fact correctly recognized already by Reinii 
14 g. methyl ethyl acetaldehyde. Since the phytochemical reductions pass off 
less connected with the fermentation process, as its quantity was i 
different with the various resinotannols; with some of 
matter are but very indistinct. In any case, they do not range 
We beg to add that Tschirch had, at a time, found the res 
resins and characterised them as resin alcohols. The coloured grou 
Benzoe amygdaloides contains tannol esters, the colourless substai ce 
however, is for the first free from these esters, but not the: ‘surroun ins 
I 
Aldehydes. 
aldehyde was prepared according its Claisen’s method) and the dicoseeee: 
V. Neustadter‘) by condensing methyl ethyl ketone (I) with ethyl chloroacetate 
presence of sodium amide. From the resulting methyl ethyl] glycidic ester ap t 
acid (IV) was obtained via the sodium salt, the acid, as well as. the corres ion 
sugar and fresh yeast, brand “OM”. After five days, the fermentation was. finished. : 
The amylalcohol thus obtained boiled at 129°: the rotation («#)—0.45°) conetponded | 
to a content of about 10 p.c. levorotatory amyl alcohol. The yield was 7.5 ; io 
cularly well with the aldehydo-ammonia compounds, a second experiment was carried 
out with d./-valeric aldehyde in presence of ammonia, when a better yield was obtained 
v.€., 12.4 g. amyl alcohol from 17.2 g. valeric aldehyde = about 70 p.c. of the theo eti 
amount. The rotation was —0.941°, answering to about 16 p.c. of the lavoro at 
alcohol. A trial test showed that on fermenting cane sugar alone with fresh top 
“M” but such a minute quantity of amyl alcohol results that it may be. n 
entirely. PPR Gary 
In a like manner Neuberg in community with A. roiluas effected the red 
by its sche Arie carbon atom, was optically active. It was tomaniaene 
course of fermentations the ee Twain, a canes rotation, Z 
at another time a different one, 1.c., the conversion by animal organs ¢ fo) 
into d- or /-lactic acid. In no case did the yield of methylheptenol 
The fermentation liquid contained acetaldehyde, the formation of 
methylheptenol formed. Evidently, the hydrogenation of methylhey 
the formation of acetaldehyde. The authors are of opinion that a 
1) Comp. inter alia, Report April 1915, 91; October 1916, 120. 
3) Berl. Berichte 38 (1905), 707. — 4) Monatsh. f. Chem. 27 (1906), 888 
