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1004998-01-9

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1004998-01-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1004998-01-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,0,4,9,9 and 8 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1004998-01:
(9*1)+(8*0)+(7*0)+(6*4)+(5*9)+(4*9)+(3*8)+(2*0)+(1*1)=139
139 % 10 = 9
So 1004998-01-9 is a valid CAS Registry Number.

1004998-01-9Upstream product

1004998-01-9Downstream Products

1004998-01-9Relevant academic research and scientific papers

Cationic P(OPh)3- or PPh3-rhodium(I) complex-catalyzed isomerizations of 5-alkynals to δ-alkynyl ketones, cyclopent-1-enyl ketones, and cyclohexenones

Tanaka, Ken,Sasaki, Kaori,Takeishi, Kenzo,Hirano, Masao

, p. 5675 - 5685 (2007)

We have developed catalytic isomerizations of 5-alkynals to γ-alkynyl ketones and cyclopent-1-enyl ketones using [Rh{P(OPh)3} 2]BF4 as a catalyst. Cu(OTf)2 and AgBF 4 are also effective catalysts for

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