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553683-70-8

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553683-70-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 553683-70-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,3,6,8 and 3 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 553683-70:
(8*5)+(7*5)+(6*3)+(5*6)+(4*8)+(3*3)+(2*7)+(1*0)=178
178 % 10 = 8
So 553683-70-8 is a valid CAS Registry Number.

553683-70-8Downstream Products

553683-70-8Relevant articles and documents

Synthesis of five-, six-, and seven-membered ring lactams by Cp*Rh complex-catalyzed oxidative N-heterocyclization of amino alcohols

Fujita, Ken-Ichi,Takahashi, Yoshinori,Owaki, Maki,Yamamoto, Kazunari,Yamaguchi, Ryohei

, p. 2785 - 2788 (2004)

A new effective catalytic system consisting of [Cp*RhCl 2]2/K2CO3 (Cp* = pentamethylcyclopentadienyl) for the lactamization of amino alcohols has been developed. As an example, the reaction of 3-(2-aminophenyl)-1-propanol in the presence of [Cp*RhCl2]2 (5.0% Rh) and K 2CO3 (10%) in acetone gives 3,4-dihydro-2(1H)-quinolinone in an isolated yield of 80%. A variety of five-, six-, and seven-membered benzo-fused lactams are synthesized by this catalytic system.

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