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131991-48-5

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131991-48-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131991-48-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,9,9 and 1 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 131991-48:
(8*1)+(7*3)+(6*1)+(5*9)+(4*9)+(3*1)+(2*4)+(1*8)=135
135 % 10 = 5
So 131991-48-5 is a valid CAS Registry Number.

131991-48-5Downstream Products

131991-48-5Relevant articles and documents

Reactions of amino-substituted cyclodextrins with 2-arylpropanoic acid derivatives

Easton, Christopher J.,Lincoln, Stephen F.,May, Bruce L.,Papageorgiou, John

, p. 451 - 456 (2007/10/03)

Reactions of 6A-amino-6A-deoxy-β-cyclodextrin and 3A-amino-3A-deoxy-(2AS,3 AS)-β-cyclodextrin with the 3-nitrophenyl esters of 2-phenylpropanoic acid and Ibuprofen occur with only low diastereoselectivity, to afford the corresponding arylpropanamido-substituted cyclodextrins. These amides are also formed by decarboxylation of corresponding malonates, again with only low diastereoselectivity. The n.m.r. spectra of the amido-substituted cyclodextrins indicate that the aryl substituent is included within the cyclodextrin annulus at low temperature, but becomes dissociated from the cavity as the temperature is increased.

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