摘要:
Provided are a method for producing a terminal conjugated dienal compound without an oxidation reaction and a terminal hydroxyacetal compound useful as an intermediate in the method. More specifically, provided are a method for producing an (E)-dienal compound comprising the steps of: a metalation reaction of an alkynal acetal compound(1) to obtain an organic metal compound (2), an addition reaction of (2) to ethylene oxide to obtain a hydroxyalkynal acetal compound (3), a reduction reaction of (3) to obtain an (E)-hydroxyalkenal acetal compound (4), a functional group conversion reaction of (4) to obtain an (E)-alkenal acetal compound (5) having a leaving group X, an elimination reaction of (5) to obtain an (E)-dienal acetal compound (6), and a hydrolysis reaction of (6) to obtain the (E)-dienal compound (7); and others.
摘要:
The present invention is a method of producing a 2'-trifluoromethyl-substituted aromatic ketone comprising reacting a 2-halogen-substituted benzotrifluoride compound with magnesium metal to convert the compound to a Grignard reagent; and reacting the Grignard reagent with an acid anhydride; and then hydrolyzing the resultant to produce a 2'-trifluoromethyl-substituted aromatic ketone. The method of producing a 2'-trifluoromethyl-substituted aromatic ketone of the present invention enables 2'-trifluoromethyl-substituted aromatic ketone to be produced without using expensive raw materials by generating a Grignard reagent as an intermediate and reacting this Grignard reagent with an acid anhydride in an efficient productivity. The 2'-trifluoromethyl-substituted aromatic ketone that is produced by the method of producing a 2'-trifluoromethyl-substituted aromatic ketone of the present invention can be used as fine chemicals, raw materials for pharmaceuticals and agrochemicals, raw materials for resins and plastics, electronics and information related materials, optical materials, and the like.
摘要:
Provided is a method for industrially producing a conjugated Z-alken-yn-yl acetate such as Z-13-hexadecen-11-yn-yl acetate which is a sex pheromone component of a pine processionary moth, and an intermediate for the conjugated Z-alken-yn-yl acetate under mild conditions at a high yield. More specifically, provided is a method for producing a conjugated Z-alken-yn-yl acetate (5) comprising the steps of: reacting an ω-halo-2-alkynal (1) with an alkylidene triphenylphosphorane (3) through a Wittig reaction to obtain a conjugated Z-alken-yn-yl halide (4), and acetoxylating the conjugated Z-alken-yn-yl halide (4) into a conjugated Z-alken-yn-yl acetate (5).
摘要:
A process for obtaining an industrially useful 2-chloromethylbenzaldehyde-containing liquid composition at a high yield is provided. More specifically, a process for producing 2-chloromethylbenzaldehyde comprising step (A) of mixing 1-dichloromethyl-2-chloromethylbenzene and sulfuric acid having a concentration of 84.5% by weight or more; and step (B) of mixing a mixture obtained in step (A) and water is provided.
摘要:
The invention relates to a method for producing 1,2-diarylethanones by reacting an arylacetonitrile with an aromatic compound and by hydrolysing the ketimine compound that has been formed, at least one dialkyl ether of a monoalkylene or polyalkylene glycol, or a cyclic ether with at least two oxygen atoms being used as a solvent for the reaction. The method produces excellent yields at an ambient temperature and does not require the solvent to be dried.
摘要:
A process for producing hinokitiol which comprises obtaining 1-isopropylcyclopentadiene from cyclopentadiene and an isopropylating agent represented by the general formula R-X (wherein R represents isopropyl; and X represents halogeno, etc.) (the step 1); reacting the obtained product with a dihaloketene to give a ketene-adduct (the step 2); and then decomposing this ketene-adduct (the step 3); wherein the above step 1 involves the following three steps: (a) the step of preparing a cyclopentadienyl metal; (b) the step of isopropylating the cyclopentadienyl metal in an aprotic polar solvent to give isopropylcyclopentadiene; and (c) the step of isomerizing 5-isopropylcyclopentadiene contained in the product selectively into 1-isopropylcyclopentadiene under heating.
摘要:
This invention relates to a process for the selective monochlorination or dichlorination of certain substituted alkenes using trichloroisocyanuric acid. The chlorinated alkenes can be easily hydrolyzed to provide α-monochloroketones or α,α-dichloroketones with a high degree of selectivity. The resulting α-monochloroketones or α,α-dichloroketones have utility as fungicides or function as useful intermediates for fungicides.