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A Manual of the Chemistry of the Carbon Compounds

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THE CABBON C0MF0UND8. 181<br />

Lactic Acid. Chloronropionic Acid. Lactyl Chloride.<br />

Cffa<br />

IH.OH CHC1 CHC1<br />

AO.OH<br />

CO.OH COC1<br />

Ethyl Lactatc. KtUyttactic Acid. Dietliyl Loetatc.<br />

CHS CHS CH3<br />

CH.OH CH.C'<br />

H.OC2H6<br />

CH.OCtHs<br />

CO.OC8H6 CO.OH CO.OC2HS<br />

Loctamide. CHS Alanino. CHS Loctyldinmide. CE3<br />

CH.OH CH.NH8 CH.NH2<br />

C0.NH2 CO.OH CO.NHj<br />

The acids <strong>of</strong> this group can be obtained syn<strong>the</strong>tically by heating<br />

ivn aldehyde with hydrocyanic acid and dilute hydrochloric acid;<br />

acctaldehydo yielding lactic acid:—<br />

CH3<br />

CHS<br />

|<br />

I 4- HCN 4 HCl + 2H2O = CH.OH + NH.C1<br />

OHO I<br />

CO.OH<br />

Many acids <strong>of</strong> this series are known in several isomeric modifications<br />

; <strong>the</strong> cause <strong>of</strong> <strong>the</strong> isoinerism being ei<strong>the</strong>r a different grouping <strong>of</strong><br />

<strong>the</strong> carbon atoms, or <strong>the</strong> alcoholic Iiydroxyl occupying ano<strong>the</strong>r position.<br />

Thus we know three oxybutyric acids:—a<br />

Oxybutyric Acid. $ Oxybntyrio Acid. Oxy-isobutyrie Acid.<br />

CHS S<br />

C% %<br />

CHSCHS<br />

1 1<br />

^<br />

CH2 CH.OH COH<br />

CH.OH CHs CO.OH<br />

CO.OH CO.OH<br />

Oxy-isobutyric acid is not only obtained by <strong>the</strong> action <strong>of</strong> moist<br />

silver oxido ou monobromisobutyi-ic acid, but has also been produced<br />

CO-OH<br />

by replacing in oxaUc acid | one atom <strong>of</strong> oxygen by two <strong>of</strong><br />

CO-OH<br />

methyl. This is done by heating methyl oxalate with zinc-methyl.

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