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1620403-91-9

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1620403-91-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1620403-91-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,0,4,0 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1620403-91:
(9*1)+(8*6)+(7*2)+(6*0)+(5*4)+(4*0)+(3*3)+(2*9)+(1*1)=119
119 % 10 = 9
So 1620403-91-9 is a valid CAS Registry Number.

1620403-91-9Relevant academic research and scientific papers

Rh(III)-catalyzed intramolecular redox-neutral or oxidative cyclization of alkynes: Short, efficient synthesis of 3,4-fused indole skeletons

Zhou, Bing,Yang, Yaxi,Tang, Huanyu,Du, Juanjuan,Feng, Huijin,Li, Yuanchao

supporting information, p. 3900 - 3903 (2014/08/18)

A Rh(III)-catalyzed intramolecular redox-neutral or oxidative annulation of a tethered alkyne has been developed to efficiently construct 3,4-fused indoles via a C-H activation pathway. The advantages of this process are (1) ready availability of annulation precursors; (2) broad substrate scope; (3) complete regioselectivity; (4) simple and mild reaction conditions; and (5) no need for an external oxidant or to employ molecular oxygen as the stoichiometric terminal oxidant.

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