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1638667-55-6

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1638667-55-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1638667-55-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,8,6,6 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1638667-55:
(9*1)+(8*6)+(7*3)+(6*8)+(5*6)+(4*6)+(3*7)+(2*5)+(1*5)=216
216 % 10 = 6
So 1638667-55-6 is a valid CAS Registry Number.

1638667-55-6Downstream Products

1638667-55-6Relevant articles and documents

Palladium-catalyzed cascade annulation to construct functionalized β- And γ-lactones in ionic liquids

Li, Jianxiao,Yang, Wanfei,Yang, Shaorong,Huang, Liangbin,Wu, Wanqing,Sun, Yadong,Jiang, Huanfeng

supporting information, p. 7219 - 7222 (2014/07/21)

A highly efficient and mild palladium-catalyzed, one-pot, four-step cascade annulation has been developed to afford functionalized β- and γ-lactones in moderate to good yields with high regio- and diastereoselectivities in ionic liquids. The employment of ionic liquids under mild reaction conditions makes this transformation green and practical. Especially, this reaction provided a novel and convenient methodology for the construction of naturally occurring biologically active β- and γ-lactones.

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