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| TCI Chemistry News September 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 and introduces a chiral ligand for the synthesis of optically active aziridines, an electrophilic sulfur-introducing reagent for fused thiophene derivative synthesis, peptide coupling using a Mukaiyama condensation reagent, olefin metathesis using UltraCat and our research publication TCIMAIL volume 187. | ||||
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Chiral Ligand for the Synthesis of Optically Active AziridinesA reaction using (-)-4-tert-butyl-2,6-bis[(4S,5S)-4,5-tetramethylene-1-(2,4,6-trimethylbenzenesulfonyl)imidazolin-2-yl]phenol [B6146] as a chiral ligand enables the synthesis of optically-active aziridines from 2H-azirines. The addition of 2H-azirine and diphenyl phosphite to the reaction mixture of B6146, MS 4A, and diethylzinc produces the optically-active aziridine. The aziridines can be converted to chiral amines and oxazolines without loss of enantiopurity. | ||||
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Electrophilic Sulfur Introducing Reagent for Fused Thiophene Derivative SynthesisBis(phenylsulfonyl) sulfide [B3288] can form a variety of thiophene rings or rigid sulfide bonds by the reaction with nucleophiles such as aryl lithium under mild conditions. B3288 is a synthetic equivalent of sulfur dichloride (SCl2), which is highly toxic and difficult to handle. Benzenesulfinic acid, a byproduct of the reaction, can be easily removed by liquid separation and purification. | ||||
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TCI Practical Example: Peptide Coupling using Mukaiyama Condensation ReagentTCI is proud to introduce an improvement of the amidation step using 2-chloro-1-methylpyridinium iodide [C0903], the Mukaiyama condensation reagent. 2-Chloro-1-methylpyridinium iodide is known to cause less racemization. | ||||
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TCI Practical Example: Olefin Metathesis Using UltraCatTCI is proud to introduces the ring-closing metathesis of diethyl diallylmalonate using UltraCat [U0141] as a catalyst. The reaction report was 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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TCI Chemistry Research: TCIMAIL 187Released in August 2021, TCI's latest issue features Prof. Tomohiro Asai’s article "Nucleic Acid Delivery System with DOP-DEDA, a Charge-Reversible Lipid Derivative", an article by Nippon Fine Chemical Co., Ltd. "Preparing Liposome Mixtures with Nippon Fine Chemical's High-purity Phospholipids and Presome® Series", and Prof. Nagatoshi Nishiwaki’s chemistry chat. We also feature research on:
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