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ChemicalBook CAS DataBase List β-Cyclodextrin
7585-39-9

β-Cyclodextrin synthesis

9synthesis methods
Usually produced commercially from Bacillus macerans or B. circulans fermentation of starch or starch hydrolysate.
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Yield:29390-67-8 70% ，7585-39-9 30%

Reaction Conditions:

with ammonia in water at 60; for 5 h;Product distribution / selectivity;

Steps:

2

Compound 2 (3.0 g, 2.33 mmol) was dissolved in 50 ml concentrated NH4OH solution. The reaction mixture was stirred at 60° C. for 5 h, cooled to room temperature and poured into 500 ml acetone to give a white precipitate. TLC analysis performed on silica plates (EtOAc:2-propanol:conc. NH4OH:water-7:7:5:4) showed a mixture of product 4 (70%) and β-CD 1 (30%). The product 4 was recrystallized from ethanol-water (3:7). The 1H NMR data are as in Example 1.

References:

US2008/275139,2008,A1 Location in patent:Page/Page column 11

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