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(E)-2-benzylidene-5-(thiophen-2-yl)spiro[cyclopentane-1,2'-indene]-1',3,3'-trione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

1612772-40-3

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1612772-40-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1612772-40-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,1,2,7,7 and 2 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1612772-40:
(9*1)+(8*6)+(7*1)+(6*2)+(5*7)+(4*7)+(3*2)+(2*4)+(1*0)=153
153 % 10 = 3
So 1612772-40-3 is a valid CAS Registry Number.

1612772-40-3Downstream Products

1612772-40-3Relevant academic research and scientific papers

Phosphine-initiated domino reaction: A convenient method for the preparation of spirocyclopentanones

Liang, Ling,Li, Erqing,Xie, Peizhong,Huang, You

supporting information, p. 1270 - 1273 (2014/05/06)

An efficient synthetic approach has been developed for the construction of the spirocyclopentanone skeleton via a phosphine-catalyzed [3+2] annulation reaction. With this novel and economical protocol, various quaternary carbon-centered spirocyclopentanones could be readily obtained. New domino reaction: An efficient synthetic approach has been developed for the construction of spirocyclopentanone skeletons via a phosphine catalyzed [3+2] annulation reaction of ynones and 2-arylideneindane-1,3-diones. With this novel and economical protocol, various quaternary carbon-centered spirocyclopentanones could be obtained readily under mild conditions in excellent yields.

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