IL28516A - Algicidal carbamoyloxy phenyl carbamates and process for their manufacture - Google Patents

Description

carbamoyloxy phenyl carbamates and process for their The relates to algloides containing substituted Combatting algae in waters is a difficul since the reproduction of algae takes place tremely lor this reason their destruction has to take place completely as Copper namely copper have already been as at a concentration of to 1 The effect of this compound however varies greatly dependin on the of the water and the applicatio the becoming significantly in hard Furthermore copper sulphate can poisonous to especiall in sof evenat concentrations which are only slightly the concentrations for use against Furthermore sodium arsenate and been prepensed as Howeve decisive advantages over copper sulphate could be achieved with these materials either respect of toxicity tofish or in respect of the effect Recently has become as an alglcide which is distinguished by effectiveness low toxicity to However the compound has proved to too phytotoxic for example water flows from swimming pools or ponds on to adjacent It has now been found that materials containing on or more compounds of general formula in which denotes alkyl optionally substituted by a furfury1 or aryl or aralkyl optionally substituted by haloge alkyl halogenalkyl alkoxy or denotes cycloalkyl or denotes hydroge or and together with the denot a non aromatic heterocyclic ring which optionally contains further and denotes alkenyl or alklnyl which optionally be substituted by halogen possess a high activity and avoid the disadvantages of the known The excellent effect of is for example surpassed by some of active substances to be used in accordance with the with the danger of phyto not or only existing to a practically negligible even a equally high concentration as for the known substance were to be further advantage of the compounds to be used accordance with the invention their very slight toxicity to The effectiveness of the materials of the invention against algae is surprising since known for example do not any such Compounds whioh may he used in aooordanee with the invention for example the Compound Same of Physical Constants 1 117 2 116 3 carbamoylox amate 153 4 127 5 6 150 carbamoylox 8 9 158 10 126 11 129 12 140 But 153 14 carbamate 129 Eth learbamo Compound of Physical Constants 16 17 amate 131 18 127 125 20 21 114 22 23 pheny 142 24 159 25 E 27 28 140 29 109 30 jS 118 31 hy e 32 147 130 Compound of Compound Physical Constants 34 carbamate 132 35 157 36 ate 37 164 38 But 1 phen arbamoy mate 134 39 But 153 40 155 41 mo bamat 149 42 118 44 moy amat 149 4 phenylVcarbamate 125 46 133 47 145 C amate 145 147 4 124 126 C 50 oarbamo 139 142 C Compound Name of Compound Physical Constants ester hyl 151 C 53 166 54 V carbamoyl 154 55 126 Methyl 188 Methyl bamate 167 58 V 150 120 C 60 122 C 61 154 C 62 C 112 C 64 129 C carbamoyl 108 C 66 7 C 67 C 68 hen 142 144 C Compound Name of Physical 69 143 144 70 Iso a 71 phenyl a 148 72 p a 156 73 phenyl 142 carbamate a 75 163 M 134 77 164 78 e 159 a 165 SO 81 N 173 174 82 146 C phenyl 132 134 8 Ethy 123 86 117 118 Compound of Compound Physical 87 112 1 88 90 89 90 158 91 earbamoylox 154 92 150 117 94 90 161 96 97 176 98 Ethyl 133 99 100 148 101 102 157 Com ound Name of Compound Physical Constants pheny b ama 107 al ly bamoyl ox phenyl ear 108 op carbamoyl phenyl 109 Al ly ear b ox phenyl 9 110 122 oxy phenyl 112 All ss 149 Al ly c c arb anoy 134 114 pheny 87 117 earbamoylox e 118 carbamate 113 119 p r opy carbamte 149 carbamate 99 103 C 121 Et t carbamate 87 122 rv 87 89 C r Furthermore active substances in in the previously indicated the residue present at the of the group for represents benzyl or should be quoted as being particularly These compounds may be manufactured by methods whic are in themselves for example by action with appropriate isocyanates in the presence of a catalyst o with appropriate acid chlorides in the presence of an accept The compounds to be used in accordance the invention may be used by themselves if as mixtures with one another with other They used either directly or in the form preparations suc as for example emulsions with the additio liquid solid or diluents and tionally Of wetting dispersin The various forms of preparations are factured in a manner which is in Itself for example by grinding or mixing For general amounts of by weight of active substance per have already proved effective when using the materials of the excellent effect of the materials of the vention is shown by the following example of Example 1 Vessels containing tap water which had been oculated with i a greenhouse ment at summer treated with emulsions or suspensions in each case containing 5 of hamate or Vigorous formation of algae took place in controls and i the case of the comparison The vessels whic the compound of invention on the other hand remained free of Substance Formation of Algae 0 10 Untreated 0 no formation of algae 10 strong formation of algae The have biologically the same effect as and Example 2 Vessels containing tap which had been culated with were treated with emulsions or suspensions each containing and of mate o and were in a greenhouse summer As ma be seen from the the mate of the invention 4 weeks at least 20 times wore tive 6 weeks 100 times more fective than the comparison Active Substance 5 ppm ppm ppm ppm B A A B A B carbamate 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 10 10 10 10 10 Untreated 10 0 no formation of algae 10 strong formation of algae A 4 weeks after treatment weeks after tr t insufficientOCRQuality

Claims (1)

1. The followin for have biologically the same effect as the compounds and carbamate i As has been the toxicity to blooded animals of the compounds to be used ing to invention is very Thus when ing the peroral toxicity to rats no fatalities red even at a dosage of HAVING particularly described and ascertained e of our said invention and in what manner the is to be performed we deolare that what we claim characterised by containing one or more compounds of general formula 0 in which by a furfuryl or aryl or aralkyl optionally substituted by halogen allyl alky1 alkox alkylmerca or denotes oalkyl or denotes hydrogen or and together with the denote a non heterocyclic optionally contains further and alkenyl or which may optionally be terminally substituted by Process for combatting characterised that materials containing one or compounds of general formula 0 which denotes alkyl optionally substituted by furfuryl or aryl or aralkyl optionally substituted by halogen alkyl halogenalkyl alkoxy denotes hydrogen or or denotes cycloalkyl or allyl and together V7ith the denote a heterocyclic ring optionally contains further and denotes alkenyl or alklnyl which may optionally terminally substituted by Algioides as claimed in Claim 1 stantially as described Process for combatting algae as claimed Claim 2 and substantially as described as for insufficientOCRQuality