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15837-43-1

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15837-43-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 15837-43-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,8,3 and 7 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 15837-43:
(7*1)+(6*5)+(5*8)+(4*3)+(3*7)+(2*4)+(1*3)=121
121 % 10 = 1
So 15837-43-1 is a valid CAS Registry Number.

15837-43-1Relevant articles and documents

Carboxylic acid-catalyzed one-pot synthesis of cyanoacetylureas and their cyclization to 6-aminouracils in guanidine ionic liquid

Chavan, Sunil S.,Shelke, Rupesh U.,Degani, Mariam S.

, p. 399 - 403 (2013/05/21)

A novel, one-pot, carboxylic acid-catalyzed synthesis of cyanoacetylureas via in situ generated ureas and their cyclization to 6-aminouracils in the presence of the guanidine-based ionic liquid 1,1,3,3-tetramethylguanidine lactate [TMG][Lac] is described. The ureas were synthesized from amines and potassium cyanate, which on reaction with cyanoacetic acid in the presence of acetic anhydride in the same pot afforded cyanoacetylureas, which undergo cyclization in [TMG][Lac] as solvent as well as catalyst to afford 6-aminouracils. One-pot synthesis of cyanoacetylureas, efficient and rapid cyclization, better yield, shorter reaction time, easy workup procedure, and recyclability of the ionic liquid are some advantages of this procedure.

Ionic liquid mediated one-pot synthesis of 6-aminouracils

Chavan, Sunil S.,Degani, Mariam S.

supporting information; experimental part, p. 296 - 299 (2012/03/26)

A novel, one-pot synthesis of 6-aminouracils via in situ generated ureas and cyanoacetylureas in the presence of an ionic liquid catalyst, 1,1,3,3-tetramethylguanidine acetate, is described. The catalyst can be recycled for five consecutive runs without loss of activity. The mechanism for the ring closure of cyanoacetylurea to 6-aminouracil is also discussed.

Tricyclic Pyrimidine Derivatives as Wnt antagonists

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Page/Page column 19-20, (2011/01/12)

The present invention relates to compounds having the general formula (I) with the definitions of X1 - X3, Y1, Y2, L1, R1 and R2 given below and/or solvates, hydrates, esters and pharmaceutically acceptable salts thereof. Furthermore, the invention relates to the use of said compounds for modulating of the Wnt signalling pathway activity and their use as a medicament, preferably for the treatment of cancer.

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