A method for solid-phase synthesis of vasopressin receptor peptide agonist selepressin
A technology of vasopressin and synthetic method, applied in the field of solid-phase synthesis of Selepressin, which can solve the problems of difficult removal of iodine, many impurities, low yield and purity, etc.
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Embodiment 1
[0040] The preparation of embodiment 1 polypeptide resin
[0041] Weigh 50 g of Rink Amide resin with a substitution degree of 1.0 mmol / g into a solid-phase reaction column, add 50 mL of DMF, and swell with nitrogen gas for 60 minutes; then deprotect with 50 mL of DBLK for 6 min+8 min, and wash with 100 mL of DMF for 6 times. Weigh 74.3g (250mmol) Fmoc-Gly-OH and 33.8g (250mmol) HOBT and dissolve them with 150mL DMF, add 31.5g (210mmol) DIC under ice-water bath to activate for 3min, then add the mixed solution into the reaction column, and react at room temperature for 2 Hours, use ninhydrin to detect the end of the reaction (if the resin is colorless and transparent, the reaction is terminated; if the resin develops color, the reaction is extended for 1 hour). After the reaction is over, wash the resin with 150mL DMF for 3 times, add 150mL DBLK for deprotection for 6min + 8min, wash the resin with 150mLDMF for 6 times, and detect the color of the resin with ninhydrin. Repeat...
Embodiment 2
[0042] The preparation of embodiment 2 polypeptide resins
[0043]Weigh 50 g of Rink Amide-AM resin with a substitution degree of 1.0 mmol / g into a solid-phase reaction column, add 50 mL of DMF, and swell with nitrogen gas bubbling for 60 minutes; then deprotect with 50 mL of DBLK for 6 min+8 min, and wash with 100 mL of DMF for 6 times. Weigh 74.3g (250mmol) Fmoc-Gly-OH and 33.8g (250mmol) HOBT and dissolve them with 150mL DMF, add 31.5g (210mmol) DIC under ice-water bath to activate for 3min, then add the mixed solution into the reaction column, and react at room temperature for 2 Hours, use ninhydrin to detect the end of the reaction (if the resin is colorless and transparent, the reaction is terminated; if the resin develops color, the reaction is extended for 1 hour). After the reaction is over, wash the resin with 150mL DMF for 3 times, add 150mL DBLK for deprotection for 6min + 8min, wash the resin with 150mLDMF for 6 times, and detect the color of the resin with ninhyd...
Embodiment 3
[0044] The preparation of embodiment 3 polypeptide resins
[0045] Weigh 50 g of MBHA resin with a substitution degree of 1.0 mmol / g into a solid-phase reaction column, add 50 mL of DMF, and swell with nitrogen gas for 60 minutes; then deprotect with 50 mL of DBLK for 6 min + 8 min, and wash 6 times with 100 mL of DMF. Weigh 74.3g (250mmol) Fmoc-Gly-OH and 33.8g (250mmol) HOBT and dissolve them with 150mL DMF, add 31.5g (210mmol) DIC under ice-water bath to activate for 3min, then add the mixed solution into the reaction column, and react at room temperature for 2 Hours, use ninhydrin to detect the end of the reaction (if the resin is colorless and transparent, the reaction is terminated; if the resin develops color, the reaction is extended for 1 hour). After the reaction is over, wash the resin with 150mL DMF for 3 times, add 150mL DBLK for deprotection for 6min + 8min, wash the resin with 150mLDMF for 6 times, and detect the color of the resin with ninhydrin. Repeat the ab...
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