Heterocyclic compounds, e.g. alkyl 1-alkyl-3-halomethyl-pyrazole-4-carboxylates, can be manufactured using a hydrazinium-CO2 compound, monosubstituted by an R1 group, to introduce a =N-N(alkyl) group into the heterocycle. R1 is an organic substituent selected from the group consisting of C1 to C12 alkyl ; C3 to C8 cycloalkyl ; C2 to C12 alkenyl ; C2 to C12 alkynyl ; C6 to C8 aryl ; C7 to C19 arylalkyl ; and C7 to C19 alkylaryl ; each of which may be substituted by one or more groups selected from the group consisting of R', X, OR', SR', NR'2, SiR'3, COOR', C(O)R', CN and CONR'2 wherein R' is H or a C1 to C12 group.
Dialkoxymethyl oxobutyric acid esters, their manufacture and use
申请人:SOLVAY SA
公开号:EP2644593A1
公开(公告)日:2013-10-02
Dialkoxymethyl oxobutyric acid esters of formula (I), R1-C(O)-CH(R2)-C(O)-OR3, are provided, wherein R1 denotes C1 to C5 alkyl ; C1 to C5 alkyl, substituted by at least one halogen atom ; R2 denotes C(OR4)(OR5) wherein R4 and R5 are the same or different and denote C1 to C5 alkyl ; R3 denotes C1 to C6 alkyl ; C1 to C5 alkyl substituted by at least one halogen atom ; benzyl ; phenyl ; or allyl.
They can be manufactured from compounds of formula (II), R1-C(O)-CH2-C(O)-OR3, wherein R1 and R3 have the meaning given above, and trialkylorthoformates.
They are useful, for example, as intermediates for the manufacture of fungicides.
Method for the cyclization of hydrazinoacrylic acid derivatives
申请人:SOLVAY SA
公开号:EP2671873A1
公开(公告)日:2013-12-11
Compounds of formula (I)
wherein R1 is an organic substituent, R2 is selected from C1 to C4 alkyl groups substituted by one, two or three halogen atoms selected from the group consisting of F, Cl and Br or a CF3 group, with the proviso that R2 is substituted by at least one Cl atom, and Y is selected from the group consisting of C(O)OR3, CN and C(O)NR4R5 can be produced by UV-light initiated cyclization of compounds of formula (II)
The compounds of formula (I) may be used as intermediates in the manufacture of fungicides.