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1403959-51-2

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1403959-51-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1403959-51-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,0,3,9,5 and 9 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1403959-51:
(9*1)+(8*4)+(7*0)+(6*3)+(5*9)+(4*5)+(3*9)+(2*5)+(1*1)=162
162 % 10 = 2
So 1403959-51-2 is a valid CAS Registry Number.

1403959-51-2Relevant articles and documents

Synthesis of 5,6-Dihydropyrazolo[5,1-a]isoquinoline and Ethyl (Z)-3-Acetoxy-3-tosylpent-4-enoate through Tertiary-Amine-Catalyzed [3+2] Annulation

Lei, Yu,Xing, Jiao-Jiao,Xu, Qin,Shi, Min

supporting information, p. 3486 - 3490 (2016/07/28)

The 1,4-diazabicyclo[2.2.2]octane (DABCO) catalyzed divergent [3+2] annulation of C,N-cyclic azomethine imines with δ-acetoxyallenoates was developed; 5,6-dihydropyrazolo[5,1-a]isoquinolines and ethyl (Z)-3-acetoxy-3-tosylpent-4-enoates were afforded in moderate to good yields in a one-pot manner under mild conditions. This annulation reaction provides a highly efficient method to construct dinitrogen-fused heterocycles and ethyl (Z)-3-acetoxy-3-tosylpent-4-enoates at the same time.

Lewis base-catalyzed divergent isomerizations of 5-hydroxyl-2,3-dienoate

Dong, Wei,Hu, Pengfei,Hu, Jian,Tong, Xiaofeng

supporting information, p. 1682 - 1685 (2014/03/21)

A divergent isomerization of 5-hydroxyl-2,3-dienoate 1 catalyzed by Lewis base has been developed, the phosphine catalyst leads to 5-oxohex-2(3)-enoates 2 while DABCO catalyst affords 3-ethoxy α,β-unsaturated lactone 3.

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