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CHLORINATION OF CELLULOSE WITH SULFURYL CHLORIDE IN LITHIUM CHLORIDE-DIMETHYLACETAMIDE AND AZIDATION OF THEIR PRODUCTS.

  • 출판일1992.02
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 235
Cellulose powder was chlorinated with sulfuryl chloride in a mixture of lithium chloride and N,N-dimethylacetamide in the presence of pyridine. Derivatives containing chlorine and chlorosulfate groups were prepared. Sodium iodide treatment of these derivatives yielded chlorodeoxycellulose with a maximum degree of substitution of 1.8 by chlorine introduced at C-6 and C-3. Chlorosulfate groups were fairly stable to acidic or neutral Water, but in alkaline water they were converted in to hydroxy groups or cyclic sulfates.Sodium azide treatment in N,N-dimethylformamide at between 20 and 70 degrees Centigrade replaced the chlorosulfate groups with azide and chloride ions or converted them to cyclic sulfates. At 90 degrees Centigrade, chlorine was replaced by azide. 12 refs.
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