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42044-65-5

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42044-65-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42044-65-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,0,4 and 4 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 42044-65:
(7*4)+(6*2)+(5*0)+(4*4)+(3*4)+(2*6)+(1*5)=85
85 % 10 = 5
So 42044-65-5 is a valid CAS Registry Number.

42044-65-5Relevant articles and documents

Palladium(II)-Catalyzed C(sp2)-H Bond Activation/C-N Bond Cleavage Annulation of N-Methoxy Amides and Arynes

Cheng, Xiu-Fen,Yu, Ting,Liu, Yi,Wang, Nan,Chen, Zhenzhen,Zhang, Guang-Lu,Tong, Lili,Tang, Bo

, p. 2087 - 2092 (2022/04/07)

The Pd(II)-catalyzed C-H bond activation/C-N bond cleavage annulation reaction of N-alkyoxyamide aryne is developed to synthesize 9,10-dihydrophenanthrenone derivatives. This reaction exhibited good functional group compatibility with yields up to 92%. Detailed mechanistic studies showed that the key to C-N bond cleavage is the formed eight-membered palladacycle intermediate undergoing nucleophilic addition to the carbonyl group, which provides a new and practical way for N-alkoxyamide directed C-H bond activation.

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