کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1388723 | 1500875 | 2013 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Modifications in the nitric acid oxidation of d-mannose: X-ray crystal structure of N,N′-dimethyl d-mannaramide Modifications in the nitric acid oxidation of d-mannose: X-ray crystal structure of N,N′-dimethyl d-mannaramide](/preview/png/1388723.png)
• Nitric acid oxidation of d-mannose was carried out under computer control.
• Isolated product was the crystalline diamide N,N′-dimethyl-d-mannaramide.
• The diamide was directly converted to solid disodium d-mannarate.
• The X-ray crystal structure of the diamide was determined.
Nitric acid oxidation of d-mannose was carried out under an oxygen atmosphere using a computer controlled reactor. The process represents a catalytic oxidation of d-mannose with oxygen as the terminal oxidant. The crude oxidation product was esterified with methanolic HCl and the esterified product directly converted to crystalline N,N′-dimethyl-d-mannaramide with methylamine. Treatment of the diamide in aqueous sodium hydroxide gave solid disodium d-mannarate. The X-ray crystal structure of N,N′-dimethyl-d-mannaramide was determined as a model for the repeating d-mannaramide units of stereoregular poly(alkylene-d-mannaramides). Disodium d-mannarate was prepared as a precursor of esterified d-mannaric acid for use as a reactive diacid monomer to prepare poly-d-mannaramides.
Figure optionsDownload as PowerPoint slide
Journal: Carbohydrate Research - Volume 376, 19 July 2013, Pages 29–36