| 摘要 |
NEW MATERIAL:A compound shown by formula I [R<1> is H, 1-2C (halo)alkyl or hydroxymethyl; R<2> is 1-6C haloalkyl; R<3> is H, 1-6C (halo)alkyl, hydroxymethyl, halogen or NO2; R<4> is H or halogen; R<5> is halogen, NO2 or CN; R<6> is S-B<1> (B<1> is H, 1-5C alkyl, 3-6C cycloalkyl, 2-4C alkenyl, benzyl, etc.), group shown by formula II (D<21> is H, 1-3C alkyl, 1-3C alkoxy, etc.; D<22> is H, 1-4C alkyl, phenyl, etc.), etc., or R<5> and R<6> form ring; X is O or S]. EXAMPLE:3-(7-Fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-yl)-1-methyl-6- trifluoromethyl-2,4(1H,3H)-pyrimidinedione. USE:A herbicide. PREPARATION:For example, a beta-aminoacrylic ester shown by formula III is reacted with a phenyl (thio)isocyanate shown by formula IV and then alkylated to give a compound shown by formula I. |
