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HBTU (Hexafluorophosphate Benzotriazole Tetramethyl Uronium) is a coupling reagent used in solid phase peptide synthesis. It was introduced in 1978 and shows resistance against racemization. It was introduced in 1978 and shows resistance against racemization.
Hydroxybenzotriazole (abbreviated HOBt) is an organic compound that is a derivative of benzotriazole.It is a white crystalline powder, which as a commercial product contains some water (~11.7% wt as the HOBt monohydrate crystal).
HATU was first reported by Louis A. Carpino in 1993 as an efficient means of preparing active esters derived from 1-hydroxy-7-azabenzotriazole (HOAt). [2] HATU is commonly prepared from HOAt and TCFH under basic conditions [3] and can exist as either the uronium salt (O-form) or the less reactive iminium salt (N-form).
2011-05-20 22:10 AlexNB 453×194× (39518 bytes) Chemicl structures of several commonly used uronium-based peptide coupling reagents: HATU, HBTU, HCTU, COMU. Captions English
HCTU is an amidinium coupling reagent used in peptide synthesis.It is analogous to HBTU. [1] The HOBt moiety has a chlorine in the 6 position which improves reaction rates and the synthesis of difficult couplings [2] [3] HCTU and related reagents containing the 6-chloro-1-hydroxybenzotriazole moiety can be prepared by reaction with TCFH under basic conditions. [4]
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BOP (benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate) is a reagent commonly used for the synthesis of amides from carboxylic acids and amines in peptide synthesis. [ 1 ] [ 2 ] It can be prepared from 1-hydroxybenzotriazole and a chlorophosphonium reagent under basic conditions. [ 3 ]
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