Polypeptide-polymer conjugate with improved wash performance

[0291] Example 1

[0292] Use N-succinimide carbonate to activate poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) 1.900 (50wt% ethyl

[0293] Diol)

[0294] Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) 1.900 (50 wt% ethylene glycol) (from ALDRICH) was dissolved in toluene (5 ml/g polymer). About 20% is distilled off under normal pressure to azeotropically dry the reactants. The solution was cooled to 20°C and phosgene (1.93M, 7mol/mol polymer) in toluene was added. Then, the mixture was stirred at room temperature overnight. The solvent and excess phosgene were removed in vacuo to obtain an oily intermediate bis(chloroformate).

[0295] Toluene (anhydrous 4ml/g polymer) was added to dissolve the oil again. N-hydroxysuccinimide (NHS) (2.4 mol/mol polymer) was added, and the mixture was cooled in an ice bath. Then triethylamine (2.2mol/mol polymer) was added dropwise at 0°C. The precipitation of triethylamine hydrochloride (Et 3 N. HCl). The mixture was stirred overnight at room temperature. Filter the mixture with a glass filter (G5) to remove Et 3 N.HCl. The filtrate was evaporated to dryness under reduced pressure to obtain 97% (mol/mol) oil. NMR indicated that more than 90% was activated, and there was less than 8o/o (mol/mol) of unbound NHS. Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) 1.900 bis(succinimide carbonate) (50wt% ethylene glycol) 1H-NMR (400MHz) (CDCl 3 )δ:1.15bs(I=330, in the -CH of PPG 3 ), 2.69s (I=1.7 unreacted NHS), 2.83s (I=41, succinimide), 3.41m (I=110, CH-CH in PPG 2 ), 3.55m (I=220, CH-CH in PPG 2 ), 3.61m (I=440 main peak), 4.46t (I=19, CH in PEG 2 -O-CO-).

[0296] Example 2

[0297] Activate with N-succinimide carbonate

[0298] Poly(ethylene glycol)-co-(propylene glycol)-monobutyl ether 970 (about 50wt% ethylene glycol)

[0299] Poly(ethylene glycol)-co-(propylene glycol) monobutyl ether 970 (approximately 50 wt% ethylene glycol) (from ALDRICH) was dissolved in toluene (4 ml/g polymer). Under normal pressure, about 25% was removed by distillation to azeotropically dry the reactants. The solution was cooled to 0°C and phosgene (1.93M, 5mol/mol polymer) in toluene was added. Then, the mixture was stirred at room temperature for 21 hours. The solvent and excess phosgene were removed in vacuo to obtain an oily intermediate chloroformate.

[0300] Toluene (anhydrous 2ml/g polymer) was added to dissolve the oil again. At room temperature, N-hydroxysuccinimide (NHS) (1.2mol/mol polymer) was added, and then triethylamine (1.1mol/mol polymer) was added dropwise at 0°C. The precipitation of triethylamine hydrochloride (Et 3 N. HCl). The mixture was stirred overnight at room temperature. Use a porous glass filter (G5) to filter the mixture to remove insoluble Et 3 N.HCl. The filtrate was evaporated to dryness under reduced pressure to obtain 89% (mol/mol) oil. NMR indicated >72% activation and <50/0 (mol/mol) unbound NHS. 1 H-NMR (400MHz, CDCl 3 )δ:0.91t(I=1000-CH 3 Butyl), 1.15bs (I=8744, -CH in propylene glycol 3 ), 1.39m(I=1320 CH 3 -CH 2 -CH 2 -Butyl), 1.55m (I=656-CH 2 -O-butyl), 2.68s (I=60.8 unreacted NHS), 2.83 s (I=963.2, succinimide), 3.40m (I=3059, CH-CH in propylene glycol 2 ), 3.55m (I=2678, CH-CH in propylene glycol 2 ), 3.61m (I=1764 main peak, -CH in ethylene glycol 2 -CH 2 -), 4.46m(CH 2 -O-CO-).

[0301] Example 3

[0302] Activate mPEG 350 with N-succinimide carbonate

[0303] The mPEG 350 was suspended in toluene (4 ml/g mPEG), and about 20% was distilled off under normal pressure to azeotropically dry the reactant. When the solution was cooled to 20°C, phosgene (1.93M 1.5mol/mol mPEG) in toluene was added, and the mixture was stirred overnight at room temperature. The mixture was evaporated under reduced pressure, and the obtained intermediate chloroformate was oily.

[0304] After evaporation, dichloromethane and toluene (1:2, anhydrous 4ml/g mPEG) were added to redissolve the colorless oil. Add N-hydroxysuccinimide (NHS) (1.5mol/mol mPEG) in a solid form, and then add triethylamine (1.1mol/mol mPEG) at 0°C. Triethylamine hydrochloride (Et 3 N.HCl) precipitated immediately. The mixture was stirred overnight at room temperature. Filter the mixture with a porous glass filter (G5) to remove Et 3 N.HCl. The filtrate was evaporated to dryness under reduced pressure to obtain 98% (mol/mol) oil. NMR shows that 85-95% is activated and less than 10o/o (mol/mol) HNEt 3 Cl. mPEG 350 Succinimide Carbonate (CDCl 3 )of 1 H-NMR(400MHz)(CDCl 3 )δ is: 1.42t (I=1.4, HNEt 3 CH in Cl 3 ), 2.68s (I=3.4 unreacted NHS), 2.84s (I=6.2 succinimide), 3.10dq (I=1.0, HNEt 3 CH in Cl 2 ), 3.38s (I=5.8, CH in OMe 3 ), 3.64bs (I=50 main peak), 4.47t (I=3.0, CH in PEG 2 ).