- Synthetic process of rosone
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The invention relates to a synthetic process of rosone. A solid super base is adopted as a catalyst during preparation of trichloromethyl benzyl alcohol, so that production of basic wastewater is avoided, product separation is facilitated, conversion rate of benzaldehyde is increased, the proportion of byproduct benzoic acid is reduced, and product yield is increased greatly and can be up to 95% or higher as the maximum.
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Paragraph 0024; 0027; 0030; 0033; 0035; 0037
(2018/07/30)
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- Green synthetic process of rosone
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The invention relates to a green synthetic process of rosone. A solid super base is adopted as a catalyst during preparation of trichloromethyl benzyl alcohol, so that production of basic wastewater is avoided, product separation is facilitated, conversion rate of benzaldehyde is increased, the proportion of byproduct benzoic acid is reduced, and product yield is increased greatly and can be up to95% or higher as the maximum.
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Paragraph 0031; 0037; 0044; 0045; 0052; 0057; 0062
(2018/07/30)
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- Fumigant antitermitic activity of plant essential oils and components from ajowan (Trachyspermum ammi), allspice (Pimenta dioica), caraway (Carum carvi), dill (Anethum graveoiens), geranium (Pelargonium graveoiens), and litsea (Litsea cubeba) oils against Japanese termite (Reticulitermes speratus kolbe)
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Plant essential oils from 26 plant species were tested for their insecticidal activities against the Japanese termite, Reticulitermes speratus Kolbe, using a fumigation bioassay. Responses varied with source, exposure time, and concentration. Among the essential oils tested, strong insecticidal activity was observed with the essential oils of ajowan (Trachyspermum ammi), allspice (Pimenta dioica), caraway (Carum carvi), dill (Anethum graveoiens), geranium (Pelargonium graveoiens), and litsea (Litsea cubeba). The composition of six essential oils was identified by using gas chromatographymass spectrometry. The compounds thus identified were tested individually for their insecticidal activities against Japanese termites. Responses varied in a dose-dependent manner for each compound. Phenol compounds exhibited the strongest insecticidal activity among the test compounds; furthermore, alcohol and aldehyde groups were more toxic than hydrocarbons. The essential oils and compounds described herein merit further study as potential fumigants for termite control. 2009 American Chemical Society.
- Seo, Seon-Mi,Kim, Junheon,Lee, Sang-Gil,Shin, Chang-Hoon,Shin, Sang-Chul,Park, Il-Kwon
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experimental part
p. 6596 - 6602
(2010/08/19)
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- Recoverable phase-transfer catalysts with fluorinated anions: Generation and reactions of dichlorocarbene and CCl3 anion in the heterogeneous system KOH(s)/CHCl3/nBu4NPF6
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Tetraalkylammonium salts bearing PF6- and BF 4- anions have been recognized as recoverable phase-transfer catalysts for the synthesis of 1,1-dichlorocyclopropane and α-(trichloromethyl) carbinol derivatives from alkenes or aldehydes in the heterogeneous system KOH(s)/CHCl3. The catalysts retained their catalytic activity over several reaction cycles. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
- Kryshtal, Galina V.,Zhdankina, Galina M.,Zlotin, Sergei G.
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experimental part
p. 1777 - 1782
(2009/04/11)
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- Suzuki-Miyaura cross-coupling of 1,1-dichloro-1-alkenes with 9-alkyl-9-BBN
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We addressed an unexplored application of the Suzuki-Miyaura protocol to the cross-coupling of 1,1-dichloro-1-alkenes with 9-alkyl-9-BBN. The use of bisphosphine ligands with a large P-Pd-P bite angle allowed us to synthesize Z-chlorinated internal alkenes in good yields resulting from a selective monocoupling process, a recurrent challenge with 1,1-dichloro-1-alkenes. Moreover, these monochlorinated olefins could be further transformed providing stereospecifically trisubstituted olefins.
- Liron, Frederic,Fosse, Celine,Pernolet, Alban,Roulland, Emmanuel
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p. 2220 - 2223
(2007/10/03)
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- Copper(I)-promoted dechlorinative Surzur-Tanner rearrangement of 2,2,2-trichloroethyl carboxylates
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(Matrix presented) 2,2,2-Trichloroethyl carboxylates undergo highly efficient dechlorinative Surzur-Tanner rearrangement with 2 equiv of a 1:1 molar mixture of CuCl and bpy in boiling DCE to give 1-chloroethenyl carboxylates in which copper appears to play an important role, probably by coordinating the initial radical or as a Lewis acid catalyst.
- Ram, Ram N.,Meher, Nabin Kumar
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p. 145 - 147
(2007/10/03)
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- A new and practical synthesis of vinyl dichlorides via a non-Wittig-type approach
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A practical approach for the conversion of aldehydes to vinyl dichlorides has been developed. These are three-step, one-pot reactions involving the formation of trichlorocarbinol by treatment of aldehydes with trichloroacetic acid and sodium trichloroacetate followed by in situ protection and elimination reactions to form the desired vinyl dichlorides in 85 to 95% yields. (C) 2000 Dupont Pharmaceuticals Company.
- Wang, Zhe,Campagna, Silvio,Xu, Guoyou,Pierce, Michael E.,Fortunak, Joseph M.,Confalone, Pat N.
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p. 4007 - 4009
(2007/10/03)
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