| abstract |
NEW DERIVATIVES OF UREIDO-3 (THIO)CHROMONES. THEY FOLLOW THE FORMULA: (CF DRAWING IN BOPI) WHERE:X IS AN OXYGEN OR SULFUR ATOM;Y IS A HYDROGEN ATOM OR AN ALCOY RADICAL (C-C);Z IS A HALOGEN ATOM OR A ALCOYL (C-C), CYCLOALCOYL (C-C), ALCOYL (C-C) OR PHENYL RADICAL, OPTIONALLY SUBSTITUTED,N IS A NUMBER EQUAL TO 0, 1, 2 OR 3;R IS A HYDROGEN ATOM OR AN ALCOYL (C-C) RADICAL;R AND R, IDENTICAL OR DIFFERENT, EACH REPRESENT A HYDROGEN ATOM OR AN ALCOYL (C-C), ALKENYL (C-C) OR ALKYNYL (C-C) RADICAL OR TOGETHER FORM A HETEROCYCLE COMPRISING FROM 5 TO 6 MEMBERINGS AND OPTIONALLY CONTAINING AS A HETEROATOME IN ADDITION TO THE ATOM OF NITROGEN, AN ATOM OF OXYGEN OR SULFUR. THESE COMPOUNDS ARE USABLE FOR THE SELECTIVE WEEDING OF CROPS SUCH AS COTTON, BEAN AND FEBEAN. |