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904689-15-2

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904689-15-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 904689-15-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,4,6,8 and 9 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 904689-15:
(8*9)+(7*0)+(6*4)+(5*6)+(4*8)+(3*9)+(2*1)+(1*5)=192
192 % 10 = 2
So 904689-15-2 is a valid CAS Registry Number.

904689-15-2Downstream Products

904689-15-2Relevant articles and documents

Hypervalent organoantimony compounds 12-ethynyl-tetrahydrodibenz[c,f][1,5]azastibocines: Highly efficient new transmetallating agent for organic halides

Kakusawa, Naoki,Tobiyasu, Yoshinori,Yasuike, Shuji,Yamaguchi, Kentaro,Seki, Hiroko,Kurita, Jyoji

, p. 2953 - 2968 (2007/10/03)

Extremely efficient and high-speed ethynylation of acyl chlorides, aryl iodides and bromides was demonstrated by palladium-catalyzed cross-coupling reaction of N-t-butyl-Sb-ethynyl-5,6,7,12-tetrahydrodibenz[c,f][1,5]azastibocine under mild conditions. Optimization and generalization of the hypervalent antimony-mediated coupling reaction are presented in detail. Single-crystal X-ray analysis of the N-methyl-1,5-azastibocine revealed that the remarkable reactivity enhancement of the azastibocine was derived from elongation of the antimony-ethynyl carbon bond originated from Sb-N intramolecular non-bonding interaction.

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