| 摘要 |
FIELD: organic chemistry, agriculture. SUBSTANCE: invention relates to compounds of the formula (I): 1.1-1.4 wherein: 1.1. R1 is hydrogen atom; R2 is hydrogen atom; R3 is CH3; R4 is CH3; 1.2. R1 is hydrogen atom; R2 is NO2; R3 is hydrogen atom; R4 is CH3; 1.3. R1 is hydrogen atom; R2 is NO2; R3 is hydrogen atom; R4 is C3H7; 1.4. R1 is hydrogen atom; R2 is hydrogen atom; R3 is hydrogen atom; R4 is C4H9. Compounds of the formula (I) are prepared by interaction of 5-R-butenolides with substituted salicylic aldehydes in alcohol medium, Prepared compounds are used in agriculture as regulating agents of plants growth for improvement of sowing quality of seeds. Invention provides preparing 2-oxo-2H-3-chromenones activating germination of what seeds. EFFECT: valuable properties of compounds. 1 tbl, 5 ex |
