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LU Dongtao, LIU Chao, QIN Luping, ZOU Yan. The total solid synthesis of marine cyclopeptide stylissamide Ⅰ[J]. Journal of Pharmaceutical Practice and Service, 2019, 37(5): 444-449. doi: 10.3969/j.issn.1006-0111.2019.05.011
Citation: LU Dongtao, LIU Chao, QIN Luping, ZOU Yan. The total solid synthesis of marine cyclopeptide stylissamide Ⅰ[J]. Journal of Pharmaceutical Practice and Service, 2019, 37(5): 444-449. doi: 10.3969/j.issn.1006-0111.2019.05.011

The total solid synthesis of marine cyclopeptide stylissamide Ⅰ

doi: 10.3969/j.issn.1006-0111.2019.05.011
  • Received Date: 2018-10-31
  • Rev Recd Date: 2019-02-13
  • Objective The marine cyclopeptide stylissamide Ⅰ was synthesized through a solid phase synthesis and cyclization in solution(SPS-CS). Methods 2-chlorotrityl chloride resin was used as solid support for the total synthesis.Each amino acid protected by 9-fluorenylmethyloxycarbonyl(Fmoc) group was coupled with N,N-diisopropylethylamine(DIPEA)/O-(6-chloro-1-hydrocibenzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluoro- phosphat(HCTU) as condensing agents.The linear peptide was cleaved from resin by 2,2,2-trifluoroethanol(TFE) and cyclized in the presence of(7-azabenzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate(PyAOP)/1-hydroxy-7-azabenzotriazole(HOAt)/N-methyl morphofine(NMM).Finally,the crude cyclopeptide was obtained through global deprotection with trifluoroacetic acid(TFA).The target compound was purified by preparative RP-HPLC to 98.9% pure and its structure was identified by 1H-NMR,13C-NMR and Q-TOF LC/MS. Results The first total synthesis of the marine cyclopeptide stylissamide Ⅰ was successfully realized with a yield of 67%. Conclusion A rapid,simple and high-efficient method of stylissamide Ⅰ total synthesis was successfully established.
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The total solid synthesis of marine cyclopeptide stylissamide Ⅰ

doi: 10.3969/j.issn.1006-0111.2019.05.011

Abstract: Objective The marine cyclopeptide stylissamide Ⅰ was synthesized through a solid phase synthesis and cyclization in solution(SPS-CS). Methods 2-chlorotrityl chloride resin was used as solid support for the total synthesis.Each amino acid protected by 9-fluorenylmethyloxycarbonyl(Fmoc) group was coupled with N,N-diisopropylethylamine(DIPEA)/O-(6-chloro-1-hydrocibenzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluoro- phosphat(HCTU) as condensing agents.The linear peptide was cleaved from resin by 2,2,2-trifluoroethanol(TFE) and cyclized in the presence of(7-azabenzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate(PyAOP)/1-hydroxy-7-azabenzotriazole(HOAt)/N-methyl morphofine(NMM).Finally,the crude cyclopeptide was obtained through global deprotection with trifluoroacetic acid(TFA).The target compound was purified by preparative RP-HPLC to 98.9% pure and its structure was identified by 1H-NMR,13C-NMR and Q-TOF LC/MS. Results The first total synthesis of the marine cyclopeptide stylissamide Ⅰ was successfully realized with a yield of 67%. Conclusion A rapid,simple and high-efficient method of stylissamide Ⅰ total synthesis was successfully established.

LU Dongtao, LIU Chao, QIN Luping, ZOU Yan. The total solid synthesis of marine cyclopeptide stylissamide Ⅰ[J]. Journal of Pharmaceutical Practice and Service, 2019, 37(5): 444-449. doi: 10.3969/j.issn.1006-0111.2019.05.011
Citation: LU Dongtao, LIU Chao, QIN Luping, ZOU Yan. The total solid synthesis of marine cyclopeptide stylissamide Ⅰ[J]. Journal of Pharmaceutical Practice and Service, 2019, 37(5): 444-449. doi: 10.3969/j.issn.1006-0111.2019.05.011
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