- Preparation method for iodopropynyl butylcarbamate
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The invention discloses a preparation method for iodopropynyl butylcarbamate, belonging to the technical field of preparation technology for wide-spectrum bactericides. The preparation method comprises the following steps: dissolving bicarbonate and halogen propyne in an organic solvent, carrying out a reaction under a reflux condition so as to obtain 1-hydroxy-3-propyne formate, and subjecting 1-hydroxy-3-propyne formate to acid dehydration and iodine oxidation so as to directly prepare the final product iodopropynyl butylcarbamate. The preparation method uses cheap and easily available raw materials, is simple in reaction steps, high in yield, almost free of pollution, free of harsh and dangerous reaction conditions and suitable for domestic mass production, and the prepared iodopropynylbutylcarbamate is easy to purify.
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Paragraph 0007; 0021-0024
(2018/05/07)
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- PROCESS FOR PREPARING IODOPROPARGYL COMPOUNDS
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Process for the preparation of iodopropargyl compounds of the formula (I), in which R is hydrogen, in each case optionally substituted C1-C20-alkyl, C2-C20 alkenyl, C6-C20-aryl or C3-C20-cycloalkyl and n is an integer from 1 to 6,characterized in that propargyl compounds of the formula (II) in which R and n have the above meaning, are reacted with iodine and/or metal iodides in the presence of a base and using chlorine.
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Page/Page column 2
(2013/02/28)
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- PROCESS FOR THE SYNTHESIS OF IODOPROPYNYL BUTYLCARBAMATE IN AN AQUEOUS SOLUTION OF A SUITABLE SURFACTANT
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A process for the manufacture of iodopropynyl butylcarbamate (IPBC) is disclosed wherein the subject reaction is carried out in an aqueous solution of a suitable surfactant. The iodination reactant is metallic iodide salt which serves as a donor of I+ ions. The I+ ion is generated on an as needed basis, during the reaction sequence, hence the formation of undesirable isomers of IPBC are minimized. The process of this invention produces a highly purified IPBC having, preferably, a low moisture content (wet-cake). The IPBC produced by such a process is also disclosed herein.
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Page/Page column 10-11; 12-13
(2008/06/13)
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- Process for the synthesis of iodopropynyl butylcarbamate in an aqueous solution of a suitable surfactant
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A process for the manufacture of iodopropynyl butylcarbamate (IPBC) is disclosed wherein the subject reaction is carried out in an aqueous solution of a suitable surfactant. The iodination reactant is metallic iodide salt which serves as a donor of I+ ions. The I+ ion is generated on an as needed basis, during the reaction sequence, hence the formation of undesirable isomers of IPBC are minimized. The process of this invention produces a highly purified IPBC having, preferably, a low moisture content (wet-cake). The IPBC produced by such a process is also disclosed herein.
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Page/Page column 3-4
(2008/06/13)
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- Process for the preparation of iodoalkynyl carbamates
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In preparing an iodoalkynyl carbamate by iodinating an alkynyl carbamate with iodine monochloride in water or a solvent mixture composed of water and an organic solvent in the presence of a base, the iodoalkynyl carbamate can be obtained in a yield of as high as 96 to 98% by using the alkynyl carbamate in a concentration of 5 to 20% by weight, dissolving the iodine monochloride in an aqueous solution of hydrochloric acid or an aqueous solution of an alkali metal chloride (the amount of iodine monochloride used being within the range of 1.0 to 1.2 moles per mole of the alkynyl carbamate and the amount of base used being within the range of 0.95 to 2.00 gram equivalents per mole of iodine monochloride), and carrying out the reaction at a temperature of 10° to 40° C. for a period of 1 to 4 hours. According to this process, highly pure iodoalkynyl carbamates which are useful as industrial germicides can be prepared with good selectivity and in high yield.
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- Organosilyl compounds and their use as fungicides
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Organosilyl compounds of the general formula I STR1 where R1, R2 and R3 are alkyl, substituted alkyl, alkenyl, alkynyl, cycloalkyl, phenyl or substituted aryl, R4 and R5 are alkyl or hydrogen and Y is CH2, oxygen, nitrogen or alkyl-substituted nitrogen, their salts and fungicides containing these compounds.
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