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40657-12-3

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40657-12-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40657-12-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,6,5 and 7 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 40657-12:
(7*4)+(6*0)+(5*6)+(4*5)+(3*7)+(2*1)+(1*2)=103
103 % 10 = 3
So 40657-12-3 is a valid CAS Registry Number.

40657-12-3Downstream Products

40657-12-3Relevant articles and documents

A study of Pd(II) Cl2/CuCl catalysed Wacker reaction for the deprotection of prop-2-enyl and prop-1-enyl ethers

Mereyala, Hari Babu,Lingannagaru, Sarita Reddy

, p. 17501 - 17512 (2007/10/03)

Pd(II)Cl2 (1 mole equivalent)/CuCl/DMF-H2O/O2/2h catalysed oxidation of various prop-2-enyl ethers 1a-12a is reported to result in the formation of Wacker ketones 1b,3b,5b,6b,9b,11b,12b (12-51%), hydrolysis products 2c,4c-7c,9c-12c (12-43%) and η2-vinyl complexes of palladium chloride 2c,4c,7c,8c (52-94%) respectively. The corresponding prop-1-enyl ethers 2e,4e-12e under similar conditions react with a catalytic amount of Pd(II)Cl2 (0.2 mole equivalent) rapidly (15-20 min.) to give exclusively hydroxy compounds 2c,4c-12c respectively in good yields (75-97%).

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