- Synthesis method of tri(3, 6-dioxyheteroheptyl)amine
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The invention discloses a synthesis method of tri(3, 6- dioxyheteroheptyl)amine and belongs to the technical field of organic synthesis. The method includes: exchanging triethanolamine and triborate to form ester, and reacting with 2-haloethyl methyl ether in a condition with alkali and a phase transfer catalyst to obtain tri(3, 6-dioxyheteroheptyl)amine. The method can be completed in a same reaction kettle, so that high efficiency of reaction operation is realized, a product obtained by reaction is high in purity and easy to purify, and reference is provided for industrial amplification.
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Paragraph 0022; 0023; 0028; 0029
(2019/02/27)
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- 1-Hydrosilatrane: A Locomotive for Efficient Ketone Reductions
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An efficient method for the reduction of ketones with 1-hydrosilatrane is described. In the presence of a Lewis base activator, the resulting secondary alcohols are rapidly formed in good to excellent yields (20 examples, 71–99 % yields). The relative bulkiness of 1-hydrosilatrane also enables the diastereoselective reduction of (–)-menthone to (+)-neomenthol, and the use of a chiral alkoxide activator can lead to the enantioselective reduction of prochiral ketones.
- Varjosaari, Sami E.,Skrypai, Vladislav,Suating, Paolo,Hurley, Joseph J. M.,Gilbert, Thomas M.,Adler, Marc J.
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supporting information
p. 229 - 232
(2017/01/24)
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- Silatrane as a Practical and Selective Reagent for the Reduction of Aryl Aldehydes to Benzylic Alcohols
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Hydrosilanes are cheap, readily available substrates, yet they do not see as extensive use for simple carbonyl reductions as borohydrides. Hydrosilane reducing agents broadly fall into one of two general categories: either a) they are easy to handle and require expensive and/or hazardous additives, or b) they are difficult and/or dangerous to handle. This work details the discovery of mild and functional group compatible conditions utilizing hydrosilatrane for the selective reduction of aryl aldehydes to benzylic alcohols without unwanted formation of ethers or deoxygenated products. This method offers significant advances in silane reductions as silatrane is an air- and moisture-stable yet relatively reactive reducing agent that can be used in benchtop open air reactions.
- Skrypai, Vladislav,Hurley, Joseph J. M.,Adler, Marc J.
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p. 2207 - 2211
(2016/05/09)
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- Synthesis of 4-aryl- and 4-alkyl-2-silyl-1,3-butadienes and their Diels-Alder/cross-coupling reactions
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An ene-yne cross methasis of silyl-substituted alkynes and alkenes has been developed as a route to 4-aryl- and 4-alkyl-2-silyl-substituted 1,3-dienes. The dienes prepared were used to affect highly diastereoselective Diels-Alder reactions and then the silicon-substituted Diels-Alder cycloadducts were used in Hiyama cross-coupling reactions. The cross-coupling reactions enable these silicon dienes to be used as synthons for a variety of other dienes one might prepare and need access to. Two of the silicon-substituted Diels-Alder cycloadducts and one of the Hiyama cross-coupling products were also characterized by X-ray crystallography.
- Junker, Christopher S.,Welker, Mark E.,Day, Cynthia S.
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scheme or table
p. 8155 - 8165
(2011/03/18)
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- METAL ALKOXIDES, APPARATUS FOR MANUFACTURING METAL ALKOXIDES, RELATED METHODS AND USES THEREOF
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Compounds, synthesis of, and methods for synthesizing metal alkoxide derivatives; and metal alkoxide derivatives for use as flame retardants are described. Group 13 metal alkoxides having flame retardant properties may be prepared by reacting the group 13 metal trihydroxide with an alcohol.
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Page/Page column 18
(2010/08/03)
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- DIRECT TRANSFER OF ALIPHATIC AND AROMATIC SUBSTITUENTS FROM ORGANOSILATRANES TO MERCURY(II) SPECIES
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The relative reaction rates of several silatranes (derivatives of 2,8,9-trioxa-5-aza-1-silatricyclo1,5>undecane) and HgCl2 in acetone-d6 to yield the corresponding organomercury compound are of the order of e.g., 5 * 10-1 1 mol-1 sec-1 or slightly less, a rate that is unexpectedly high compared to the essentially inert parent organotrialkoxysilanes.Thus, the apical Si-C bond of the silatrane is extraordinarily susceptible to direct electrophilic attack by mercury(II).The rates decrease in the order CH2=CH, C6H5, p-ClC6H4 > CH3 > CH3CH2, CH3CH2CH2 > C6H11, ClCH2, Cl2CH, CH3CH2O.The effects of varying the solvent and the counterions are noted, and the probable mechanism is discussed.
- Nies, J. Dirk,Bellama, Jon M.,Ben-Zvi, Nava
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p. 315 - 320
(2007/10/02)
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