Waste Corn-Cob Cellulose Supported Copper Catalyst for Click and Aza-Michael Reactions
We prepared a highly active cellulose supported poly(amidoxime) Cu-catalyst 2 by the surface modification of waste corn-cob cellulose through graft copolymerization process (Scheme 1). The Cu-catalyst 2 was efficiently promoted the click reaction1 of organic azides and terminal alkynes including the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Royal Society of Chemistry
2016
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/6727/ http://umpir.ump.edu.my/id/eprint/6727/ http://umpir.ump.edu.my/id/eprint/6727/ http://umpir.ump.edu.my/id/eprint/6727/1/Waste%20Corn-Cob%20Cellulose%20Supported%20Copper%20Catalyst%20for%20Click%20and%20Aza-Michael%20Reactions.pdf |
| Summary: | We prepared a highly active cellulose supported poly(amidoxime) Cu-catalyst 2 by the surface modification of waste corn-cob cellulose through graft copolymerization process (Scheme 1). The Cu-catalyst 2 was efficiently promoted the click reaction1 of organic azides and terminal alkynes including the three-component cyclization of a variety of alkynes, organic halides, and sodium azide (Scheme 2). The catalyst with 50 mol ppm (0.00050 mol%) to 0.05 mol% Cu promoted the cycloaddition with a TON of up to >18800, and was reused four times without loss of catalytic activity. Moreover the catalyst was also promoted the Aza-Michael reaction of aliphatic amines with a variety of olefins to give the corresponding products in up to 97% yield. |
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