FIELD: chemistry.
SUBSTANCE: invention relates to a process for the preparation of a compound of formula (I), where X represents a hydrogen atom, a fluorine atom, a chlorine atom or a bromine atom, and Y represents a hydrogen atom, a fluorine atom, a chlorine atom or a bromine atom. Proposed method comprises step 1 of reacting a compound of formula (2) and a compound of formula (3) in the presence of a Lewis acid, wherein R is a hydrogen atom or a C1-C4 alkyl group, to obtain an adduct, and step 2 of reacting the adduct obtained in step 1 and a hydrazine to obtain a compound of formula (1). In addition, an alternative method for preparing a compound of formula (I) from a compound of formula (4) is provided.
EFFECT: invention also relates to a process for the preparation of an intermediate compound of formula (4), an intermediate of formula (4), and a process for preparing a compound of formula (6) from a compound of formula (1).
14 cl, 1 tbl, 18 ex
| Title | Year | Author | Number |
|---|---|---|---|
| COMPOUND RELATED TO VITAMIN A AND METHODS OF ITS SYNTHESIS | 1998 |
|
RU2188193C2 |
| COPOLYMER, RUBBER MIXTURE, CROSS-LINKED RUBBER MIXTURE AND TYRE | 2012 |
|
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| WATER-SOLUBLE COMPOUND OF BENZOAZEPINE AND PHARMACEUTICAL COMPOSITION CONTAINING IT | 2006 |
|
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| CATALYST COMPONENT, APPLIED FOR OLEFIN POLYMERISATION, METHOD OF OBTAINING THEREOF AND CATALYST CONTAINING THEREOF | 2010 |
|
RU2532543C2 |
| PROCESS FOR PRODUCING SPYROOXAZOLIDINONES | 0 |
|
SU942597A3 |
| PHOTORESIST COMPOSITION | 1998 |
|
RU2199773C2 |
| METHOD OF PREPARING ACID CHLORIDES | 1994 |
|
RU2141940C1 |
| FUSED OXAZOLE COMPOUNDS AND USE THEREOF FOR PEST CONTROL | 2013 |
|
RU2649388C2 |
| DERIVATIVES OF THIADIAZOLYLPYRIDAZINE INHIBITING ANGIOGENESIS, METHOD OF THEIR SYNTHESIS, PHARMACEUTICAL COMPOSITION AND METHOD OF ITS PREPARING | 1998 |
|
RU2194049C2 |
| METHODS FOR PREPARING BENZOXAZINE DERIVATIVE, METHODS FOR PREPARING ITS INTERMEDIATE COMPOUND AND INTERMEDIATE COMPOUNDS | 2000 |
|
RU2258069C2 |
