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25617-45-2

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25617-45-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25617-45-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,6,1 and 7 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 25617-45:
(7*2)+(6*5)+(5*6)+(4*1)+(3*7)+(2*4)+(1*5)=112
112 % 10 = 2
So 25617-45-2 is a valid CAS Registry Number.

25617-45-2Downstream Products

25617-45-2Relevant articles and documents

Preparation method of compound containing bipyrazole ring and intermediate thereof

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Paragraph 0263-0265; 0330, (2020/05/14)

The invention discloses a preparation method of a compound containing a bipyrazole ring and an intermediate of the compound. The preparation method of a bipyrazole ring-containing compound as shown ina formula I comprises the following steps: (1) adding alkali into a mixture of a bipyrazole ring compound as shown in a formula I-1 and a solvent for replacement reaction to obtain a mixed system; and (2) adding an organic phosphorus compound shown as a formula I-2 into the mixed system in the step (1), and carrying out a phosphonation reaction shown in the specification, so as to obtain the bipyrazole ring-containing compound shown as the formula I, wherein R1 and R2 are independently a C1-C6 alkyl group, a C3-C8 cycloalkyl group and a phenyl group, R3 is a C1-C6 alkyl group, and X is halogen. The prepared compound containing a bipyrazole ring can be used as a ligand, and is suitable for the application range of amide in C-N coupling and the C-C coupling reaction of arylboronic acid andaryl chloride.

Efficient conversion of acids and esters to amides and transamidation of primary amides using OSU-6

Nammalwar, Baskar,Muddala, Nagendra Prasad,Watts, Field M.,Bunce, Richard A.

, p. 9101 - 9111 (2015/11/09)

OSU-6, an MCM-41 type hexagonal mesoporous silica with strong Bronsted acid properties, has been used to promote the high-yield conversion of carboxylic acids and esters to carboxamides as well as transamidations of primary amides in a one-pot solventless approach. A metal-free heterogeneous catalyst that promotes all of these processes has not been previously reported. OSU-6 enables these transformations to proceed in shorter times and at lower temperatures for a broad range of substrates. An added benefit is that the catalyst can be recycled and reused multiple times without significant loss of activity.

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