Montedison S.p.a.

Vincenzo Di Toro

Franco Gozzo

Pier M Boschi

Carlo Garavaglia

Simone Lorusso

Mirella Cecere

A process is herein described for obtaining lower alkyl esters of C-alkyl-tartronic or C-halogenalkyl-tartronic acids according to the reaction: ##STR1## in which R and R.sup.2, like or unlike each other, may be alkyls having C.sub.1 -C.sub.5 or halogenalkyls having C.sub.1 -C.sub.5 and R.sup.1 is an alkyl having C.sub.1 -C.sub.5.

Process for preparing alkyl esters of C-alkyl-tartronic or

Chloroformates of alkyl esters of C-alkyl or C-haloalkyl tartronic acids of the general formula: ##STR1## in which: R represents an alkyl or haloalkyl group having from 1 to 5 carbon atoms, and

Chloroformates of alkyl esters of C-alkyl- or C-haloalkyl tartronic

There are disclosed N-aryl-1,3-oxazolidine-2,4-diones of the formula: ##STR1## wherein: R=C.sub.1 -C.sub.5 alkyl; C.sub.1 -C.sub.5 haloalkyl

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Vincenzo Di Toro