69729-16-4

Upstream product

• 69729-15-3 N-Carbobenzoxy-L-tyrosyl azide 
• 69729-07-3 H-Gly-Gly-Phe-Leu-OBzl 
• 61543-55-3 Z-Tyr-Gly-Gly hydrazide 
• 77066-56-9 benzyl-L-penylalanyl-L-leucinate trifluoroacetic acid 
• 3556-56-7 4-nitrophenyl N-[(benzyloxy)carbonyl]-L-tyrosinate 
• 1164-16-5 Z-L-Tyr-OH 
• 13734-34-4 N-tert-butoxycarbonyl-L-phenylalanine 
• 34695-67-5 Z-Tyr-Gly-Gly-OEt 
• 98908-58-8 Z(OMe)-Gly-Gly-Phe-Leu-OBzl 
• 16679-95-1 benzyl (S)-(1-hydrazinyl-3-(4-hydroxyphenyl)-1-oxopropan-2-yl)carbamate 
• 74193-68-3 N-tert-butyloxycarbonyl-L-phenylalanyl-L-leucine benzyl ester 

Downstream Products

• 81678-16-2 leucine enkephalin acetate 
• 80632-52-6 sulfated [Leu⁵]-enkephalin 
• 130245-55-5 Z-Tyr(SO₃H)-Gly-Gly-Phe-Leu-OBzl 
• 58822-25-6 Leu-enkephalin 

Relevant academic research and scientific papers

Use of Dimethylformamide-Sulphur Trioxide Complex as a Sulphating Agent of Tyrosine

Dimethylformamide-sulphur trioxide (DMF-SO3) complex was found to be more suitable for tyrosine sulphation than pyridine-sulphur trioxide (Pyr-SO3) complex, the most commonly used sulphur trioxide complex for sulphation.The work-up after sulphation using

PEPTIDE SYNTHESIS BY USING PHENYLPHOSPHONIC ESTER AS A COUPLING REAGENT

Synthesis of peptides containing various functions was efficiently accomplished by treatment of the tetrabutylammonium salts of N-protected amino acids (or peptides) with amino acid esters in the presence of bis(o- or p-nitrophenyl) phenylphosphonate.Synthesis of leucine-enkephalin was successfully achieved by the above method employing a (3+2) or (4+1) fragment coupling approach.