Cas 221676-50-2,1-tert-Butyl-3,5-bis(chloromethyl)-4-trimethylsilylmethylbenzene

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Check Digit Verification of cas no

The CAS Registry Mumber 221676-50-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,7 and 6 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221676-50:
(8*2)+(7*2)+(6*1)+(5*6)+(4*7)+(3*6)+(2*5)+(1*0)=122
122 % 10 = 2
So 221676-50-2 is a valid CAS Registry Number.

221676-50-2Upstream product

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221676-53-5 1-tert-Butyl-3,5-bis(mercaptomethyl)-4-trimethylsilylmethylbenzene

221676-50-2Relevant academic research and scientific papers

Novel, strained 10b,10c-dihydropyrenes bearing bulky TMSCH2 groups at the internal positions

Sawada, Tsuyoshi,Wakabayashi, Masaki,Takeo, Hiromi,Miyazawa, Akira,Tashiro, Masashi,Thiemann, Thies,Mataka, Shuntaro

, p. 403 - 407 (2007/10/03)

Two novel, strained trans-10b,10c-dihydropyrenes, 9a-b, with internal, bulky trimethylsilylmethyl substituent(s) were synthesized. Their 14π-electron annulene systems were found to be distorted, as shown by X-ray crystallographic analyses and 1H-NMR and UV spectroscopy.

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