Articles by Topic "carboxylic acid"

1. The Methodological Value of TCFH: Advantages in Challenging Amidation and the Switching Logic of Carboxylic Acid Activation Pathways
   posted this at Apr 7, 2026

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   TCFH [N,N,N′,N,N′-tetramethylchloroformamidinium hexafluorophosphate] is often simply classified as a “powerful coupling reagent,” but a more accurate description is that it is a carboxylic acid activation reagent capable of directing carboxylic acids into different highly reactive ...
2. Improved Methods for Introducing tert-Butyl Groups: From TriAT-tBu to Direct tert-Butylation
   posted this at Mar 22, 2026

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   tert-Butyl esters are among the most commonly used protecting groups for carboxylic acids. Their long-standing importance mainly rests on two features: first, they show good stability toward a variety of nucleophiles and reducing conditions; second, they can be removed relatively conveniently ...