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87991-98-8

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87991-98-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87991-98-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,9,9 and 1 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 87991-98:
(7*8)+(6*7)+(5*9)+(4*9)+(3*1)+(2*9)+(1*8)=208
208 % 10 = 8
So 87991-98-8 is a valid CAS Registry Number.

87991-98-8Downstream Products

87991-98-8Relevant articles and documents

Transition-Metal-Free One-Step Synthesis of Ynamides

Zeng, Xianzhu,Tu, Yongliang,Zhang, Zhenming,You, Changming,Wu, Jiao,Ye, Zhiying,Zhao, Junfeng

, p. 4458 - 4466 (2019/03/26)

A robust transition-metal-free one-step strategy for the synthesis of ynamides from sulfonamides and (Z)-1,2-dichloroalkenes or alkynyl chlorides is presented. This method is not only effective for internal ynamides but also amenable for terminal ynamides. Various functional groups, even the vinyl moiety, are compatible, and thus, this strategy offers the opportunity for further functionalization.

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