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| TCI Chemistry News April 2021 | ||||
| TCI offers an extensive catalog of 30,000 high quality organic reagents suitable for benchtop-to-bulk chemistry. This issue covers our chemistry expertise in succinimide for NHS esterification and trifluoroacetylation, condensation using DCC and HOBt, Luche reduction, and TCIMAIL 186. | ||||
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Succinimide for NHS Esterification and TrifluoroacetylationTFA-NHS [S0915] is utilized not only in the esterification of carboxy groups to form NHS esters, but also in the trifluoroacetylation of amines. Furthermore, it has been reported that TFA-NHS can both protect the amino group and activate the carboxy group of aminocarboxylic acids simultaneously. In the presence of pyridine, the reaction of an excess amount of TFA-NHS with an aminocarboxylic acid provides the resulting N-TFA-protected aminocarboxylic acid NHS ester in a one-pot process. | ||||
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TCI Practical Example: Condensation Using DCC and HOBtWe are proud to present the amidation reaction using DCC [D0436] as a condensing agent, and HOBt [H0468] as an activator. The reaction report is actually performed by TCI's synthesis staff. In addition to the experimental procedure you can also see comments and analysis data from our staff. | ||||
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Luche ReductionThe Luche reduction is a regioselective reduction of α,β-unsaturated ketones to afford allyl alcohols. When α,β-unsaturated ketones are reduced using sodium borohydride [S0480], 1,4-reduction is preferred over 1,2-reduction. It is considered that since the hydride of sodium borohydride is a “soft” nucleophile, the reaction proceeds at the β-position of the carbonyl compounds, which prefers a “soft” nucleophile. However, the hydride turns to “hard” in the presence of cerium(III) chloride [C2058] and an alcohol solvent, resulting in preferential 1,2-reduction. | ||||
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TCI Chemistry Research: TCIMAIL 186Released in April 2021, TCI's latest issue features Prof. Nuno Maulide article on heterocycle formation called "Trifluoromethanesulfonic Anhydride in Amide Activation: A Powerful Tool to Forge Heterocyclic Cores”, and Prof. Nagatoshi Nishiwaki's chemistry chat. We also feature research on:
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