- Preparation method of 2-bromo-5-iodobenzyl alcohol
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The invention discloses a preparation method of 2-bromo-5-iodobenzyl alcohol. A synthesis route is simple and typical, and is simple and convenient to operate, the yield of target products is high, 1,3-diiodo-5,5-dimethyl hydantoin as an iodization reagen
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Paragraph 0092; 0093
(2018/05/16)
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- 1, 3-arylhydantoins Diiodothyronine manufacturing method
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PROBLEM TO BE SOLVED: To provide a method for producing 1,3-diiodohydantoins easily and economically. SOLUTION: In the method for producing 1,3-diiodohydantoins represented by formula, hydantoins such as 5,5-dimethylhydantoin, hypochlorite or a hypochlorite aqueous solution, and at least one of iodine, an iodine ion source and an acid are reacted in at least one of an aqueous solvent and an organic solvent. In the formula, R1and R2may be the same or different mutually and are each a hydrogen atom or a 1-6C alkyl group. In this method, iodine monochloride is not required, and consequently, 1,3-diiodohydantoin can be produced easily and economically. COPYRIGHT: (C)2013,JPOandINPIT
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Paragraph 0050; 0051; 0052
(2016/12/16)
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- PRODUCTION METHOD FOR HALOHYDRANTOIN COMPOUND AND HALOHYDRANTOIN COMPOUND
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A method for producing a halohydantoin compound according to the present invention includes the steps of: (a) providing, in a dryer, a composition containing (i) at least one component selected from the group consisting of water, an organic solvent, and elemental halogen and (ii) a halohydantoin compound; and (b) drying the composition under reduced pressure in the dryer, the reduced pressure being reduced to a pressure lower than atmospheric pressure while introducing an inert gas from an outside source into the dryer.
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Paragraph 0054; 0055; 0056; 0057; 0058; 0059; 0060-0066
(2015/11/24)
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- METHOD FOR PRODUCING HALOHYDANTOIN COMPOUND
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A production method of the present invention is a method for producing a halohydantoin compound in which method a composition including a halohydantoin compound and an impurity is treated, the method including the step of adding the composition to a mixed solvent of water and an organic solvent and washing the composition.
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Paragraph 0053; 0054; 0055
(2016/01/21)
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- Carbon-14 labeling of a trifluoromethoxy group: Synthesis of a substance P antagonist
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Synthesis of a carbon-14 labeled trifluoromethoxy group has been accomplished using the stepwise oxidative fluorination-desulfurization of a readily prepared [14C]xanthate (5). This novel labeling procedure allowed a rapid synthesis of substanc
- Raab, Conrad E.,Dean, Dennis C.,Melillo, David G.
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p. 815 - 829
(2007/10/03)
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