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1643796-18-2

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1643796-18-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1643796-18-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,3,7,9 and 6 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1643796-18:
(9*1)+(8*6)+(7*4)+(6*3)+(5*7)+(4*9)+(3*6)+(2*1)+(1*8)=202
202 % 10 = 2
So 1643796-18-2 is a valid CAS Registry Number.

1643796-18-2Downstream Products

1643796-18-2Relevant articles and documents

Indole synthesis based on a modified koser reagent

Fra, Laura,Millán, Alba,Souto, José A.,Mu?iz, Kilian

supporting information, p. 7349 - 7353 (2014/07/21)

A new metal-free method for the rapid and productive preparation of indoles has been developed. This process is based on sterically congested hypervalent iodine compounds of the family of Koser reagents, and iodosobenzene in combination with 2,4,5-tris-isopropylbenzene sulfonic acid provides the highest yields and fastest reaction times. This reagent alone promotes the chemoselective oxidative cyclization of 2-amino styrenes to indoles in high yields under mild conditions. Convenient route to indole: A fast, productive, and operationally simple indole synthesis was developed.

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