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| TCI Chemistry News March 2022 | ||||
| TCI offers an extensive catalog of 31,000 high quality organic reagents suitable for benchtop-to-bulk chemistry. This issue covers our chemistry expertise in: | ||||
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Nickel Complexes for the Cross-Coupling Reactions Using Alkoxy Groups as Leaving GroupsDichlorobis(dicyclohexylphenylphosphine)nickel(II) [D5369] and dichlorobis(tricyclohexylphosphine)nickel(II) [B3534] are utilized as catalysts for the Kumada-Tamao-Corriu type cross-coupling reaction of aryl alkyl ethers. In the presence of a catalytic amount of nickel catalyst like D5369 and B3534, aryl alkyl ethers can react with aryl Grignard reagents to afford the corresponding coupling products in good yields. The alkoxy group as a leaving group is applicable to this reaction not only in the form of aryl methyl ether but also in a cyclic ether. | ||||
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Thianthrene for Radical-Mediated Borylation of Alkyl AlcoholsAlkyl thianthrenium salts are generated from alkyl alcohols and thianthrene [T0184]. They are activated by blue light or heat to be converted following a radical pathway into alkyl boronate esters. Various alkyl alcohols activated by trifluoromethanesulfonic anhydride react with thianthrene to afford thianthrenium salts. Alkyl radical species induced by blue light or heat lead to alkyl boronic acid catechol esters. Finally pinacol and organic base are added in a one-pot manner, resulting in desired alkyl boronic acid pinacol esters. | ||||
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TCI Practical Example: Trifluoromethylation Catalyzed by Photoredox CatalystWe are proud to present the aminotriluoromethylation of 4-methylstyrene catalyzed by Ru(bpy)3(PF6)2 [T3435]. The experimenter reports acetonitrile was degassed by nitrogen for 1 hour before use. | ||||
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TCI Practical Example: Metathesis Reaction Using the Ruthenium-Indenylidene CatalystTCI introduces the ring-closing metathesis of diethyl diallylmalonate using (3-phenyl-1 H-inden-1-ylidene)bis(tricyclohexylphosphine)ruthenium(II) dichloride [P2004] as a catalyst. The reaction report is actually performed by TCI's synthesis staff. You can see not only the reaction procedure but also the comment and analysis data from our staff. | ||||
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