Convenient method for preparing polystyrene having β-hydroxy group: Its application to the synthesis of polyethylene glycol-grafted polystyrene resin

Tetrahedron Letters

Volumn 38, Issue 4, 1997, Pages 591-594

  Park, Byeong Deog ^a   Lee, Hyeong Ik ^b   Ryoo, Sun Jong ^b   Lee, Yoon Sik ^b  

^a Aekyung Central Research Center   (South Korea)

^b Seoul National University   (South Korea)

Author keywords

[No Author keywords available]

Indexed keywords

MACROGOL; POLYSTYRENE; RESIN;

ALKYLATION; ARTICLE; CHEMICAL REACTION; DRUG SYNTHESIS; TECHNIQUE;

EID: 0031013326     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(96)02399-4     Document Type: Article

References (27)

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21. 2).
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25. 12. The substitution degrees of the resulting PS-PO resin were determined as follows: PS-PO resin (∞ 200 mg) which was previously swollen in methylene chloride(5 ml) was reacted with excess phenyl isocyanate (1 ml) for 12 hours at rt. The substitution degrees were calculated from the N% of the resulting carbamate.
26. Small samples of the resin were treated with strong acid in a given time, washed, and dried in vacuum. The amount of PEG was calculated from the C% analysis data.
27. Treating with 50% trifluoroacetic acid/methylene chloride, PS-g-PEG which was originated from Merrifield resin lost 20% of PEG in 120 min, while our resin retained most of PEG during the same period.