Wangze Song
2004
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Journal
Fine chemicals
Abstract
Polyethylene glycol grafted 2-hydroxymethyl-3,5,6-trimethylpyrazine is prepared in 69% yield by condensation of polyethylene glycol dicarboxylic acid and 2-hydroxymethyl-3,5,6-trimethylpyrazine with dicydohexylcarbodiimide(DCCI) as condensating agent.The product is characterized by melting point,FTIR and~1HNMR:m.p.45~48 ℃;IR absorption 1747 cm~(-1)(CO),1254 cm~(-1)(C—O—C);~1HNMR δ =1 .9(—CH_3,3H,s),2 .2(—CH_3,6H,s),4 .2(—CH_2—,2H,s),3 .6(—OCH_2—,multi-H,s).