- Formal synthesis of dysiherbaine
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A formal synthesis of dysiherbaine was achieved from D-mannitol using Grignard addition on chiral imine, RCM and Michael addition as key steps.
- Rao, Maddimsetti Venkateswara,Naresh, Annavareddi,Saketh, Gudipati,Rao, Batchu Venkateswara
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supporting information
p. 6931 - 6933
(2019/04/10)
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- PYRIDOPYRIMIDINE OR NAPHTHYRIDINE DERIVATIVE
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A pyridopyrimidine or a naphthyridine derivative of the formula (I): wherein R1 is an optionally substituted nitrogen-containing heterocyclic group, etc.; R2 is H or a lower alkyl group; R3 is H or an optionally substitute
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Page/Page column 33
(2010/02/07)
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- Synthesis of coenzyme Q10, ubiquinone
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Processes for the stereospecific synthesis of coenzyme Q10, ubiquinone, are disclosed; a semi synthetic procedure using solanesol derived from tobacco waste as the starting material. The process of the invention results in high yields of isometrically use
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- Novel Synthesis of (-)-(R)-Cembrene A, Synthesis of (+)-(R)-Cembrenene and (+)-(S)-Cembrene
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A novel synthesis of (-)-(R)-cembrene A ((-)-3) was developed using the Sharpless epoxidation for the introduction of the chiral center.Furthermore, the synthesis of (+)-(R)-cembrenene ((+)-4) showed that this cembranoid must have the (R)-configuration and not, as previously reported, the (S)-confguration.Selective hydrogebation of (+)-4 afforded (+)-(S)-cembrene ((+)-5).
- Farkas, Imre,Pfander, Hanspeter
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p. 1980 - 1985
(2007/10/02)
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- SYNTHESIS OF all-(E)-DECAPRENOL AND ITS 2Z ISOMER
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C5-chain growth in the structure of natural solanesol, isolated from tobacco, was realized by a C3 + C2 scheme.Decaprenol was separated into isomers with respect to the newly formed double bond by column chromatography on silica gel.The isomeric compositi
- Kozlova, I. V.,Obol'nikova, E. A.,Kogan, L. M.,Filippova, T. M.,Kharchevnikov, A. P.,Samokhvalov, G. I.
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p. 1055 - 1061
(2007/10/02)
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- Diphenyl ether derivatives and their use as insecticides
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A compound of formula: STR1 wherein W represents one or more substituents selected from halo, alkyl, alkoxy, alkoxyalkyl, haloalkyl and haloalkoxy or W represents a bidentate group linking adjacent carbon atoms selected from alkylene and alkylenedioxy; Y is a group of formula STR2 wherein X is a group of formula --(CF2)n R3, where R3 is selected from hydrogen, chloro and fluoro, and n is one or two, R1 is selected from hydrogen, chloro, fluoro and hydroxy and R2 is selected from methyl, cyano, ethynyl and hydrogen; Q is selected from carbon bearing a hydrogen atom and nitrogen; and Z represents one or more substituents selected from fluoro, benzyl, phenoxy, chlorophenoxy, fluorophenoxy and bromophenoxy, or any isomer thereof. Processes for preparing these compounds and intermediates for use therein, insecticidal compositions containing these compounds and the use thereof are also disclosed.
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- Synthesis of 2-Hydroxybut-3-enylglucosinolate (Progoitrin)
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A synthesis of 2-hydroxybut-3-enylglucosinolate (progoitrin) is described.Its properties and authentication of its biological activity are discussed.This is the first time that this particular glucosinolate has been isolated in pure form by synthesis.
- MacLeod, Alexander J.,Rossiter, John T.
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p. 717 - 721
(2007/10/02)
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- Bis-piperidine compounds
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Bis(2-hydroxymethyl-3,4,5-trihydroxypiperidine-1-yl-propenyl) compounds and their acid addition salts are antihyperglycemic agents. Typical examples are 1,4-bis[3-(2-hydroxymethyl-3,4,5-trihydroxypiperidin-1-yl)prop-2-enyl] benzene and 1,3-bis-{4-[3-(2-hy
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- Thermochemical Bond Dissociation Energies of Carbon-Magnesium Bonds
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The heats of formation of 29 alkylmagnesium bromides, isobutyl bromide, and neopentyl bromide have been determined, and bond dissociation energies have been derived for the Grignard reagents.For saturated alkyl derivatives the C-Mg bond strength decreases with an increasing number of β-hydrogens in the series methyl, neopentyl, isobutyl, butyl, ethyl, 1-ethylpropyl, 1-methylpropyl, isopropyl, and t-butyl.Bonding in alkyl bromides and alkylmagnesium bromides is discussed.
- Holm, Torkil
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p. 464 - 467
(2007/10/02)
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