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423773-03-9

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423773-03-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 423773-03-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,3,7,7 and 3 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 423773-03:
(8*4)+(7*2)+(6*3)+(5*7)+(4*7)+(3*3)+(2*0)+(1*3)=139
139 % 10 = 9
So 423773-03-9 is a valid CAS Registry Number.

423773-03-9Downstream Products

423773-03-9Relevant articles and documents

Synthesis and application of chiral bisphosphines through lithiation-conjugate addition tandem cyclization of chiral α,β,ψ,ω-unsaturated bisphosphine oxide

Nagaoka, Yasuo,Inoue, Hideki,El-Koussi, Nawal,Tomioka, Kiyoshi

, p. 122 - 123 (2007/10/03)

Upon treatment with lithium diisopropylamide achiral and chiral α,β,ψ,ω-unsaturated bisphosphine oxides underwent lithiation-conjugate addition tandem cyclization to afford the corresponding endo-α,β-unsaturated cyclic bisphosphine oxides; sequential ster

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