The NMR spectra of α-cyano-β-amino-β-alkylacrylic esters prepared from α-cyano-β-methoxy-β-alkylacrylic esters and simple amines have been studied. It has been found that these aminoesters, in a variety of solvents, are all present in an intramolecular hydrogen-bonded enamine form with a chelate ring.
Pyrimidine derivatives and herbicides containing the same
申请人:——
公开号:US20040092402A1
公开(公告)日:2004-05-13
The present invention provides a pyrimidine derivative represented by the formula:
1
wherein R
1p
and R
1q
are the same or different, and each represents (1) hydrogen, (2) halogen, (3) a C
1-6
alkyl group which may be substituted or (4) a C
1-6
alkoxy group, and so on,
R
2
is halogen, a C
1-6
alkyl group, cyano group, and so on, Ar is a phenyl group which may be substituted or is a condensed hetero ring which may be substituted, which has excellent selective herbicidal activity, and a herbicide containing the derivative.
PYRIMIDINE DERIVATIVES AND HERBICIDES CONTAINING THE SAME
申请人:Sumitomo Chemical Takeda Agro Company, Limited
公开号:EP1333029A1
公开(公告)日:2003-08-06
The present invention provides a pyrimidine derivative represented by the formula:
wherein R1p and R1q are the same or different, and each represents (1)hydrogen, (2)halogen, (3) a C1-6alkyl group which may be substituted or (4) a C1-6alkoxy group, and so on,
R2 is halogen, a C1-6alkyl group, cyano group, and so on, Ar is a phenyl group which may be substituted or is a condensed hetero ring which may be substituted, which has excellent selective herbicidal activity, and a herbicide containing the derivative.