FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to a method for synthesis of novel intermediate indoline compounds of the general formula (VIII): 
wherein R1 means (C1-C20)-alkylcarbonyl; R2 and R3 are similar or different and each means a lower alkyl group; R4 means hydrogen atom (H), (C1-C4)-alkyl or its salts. Method involves addition of pivaloyl group to compound of the general formula (VII): 
wherein R1, R2, R3 and R4 are given above, or its salt.
EFFECT: improved method of synthesis.
2 cl, 24 ex
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