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155373-56-1

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155373-56-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 155373-56-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,3,7 and 3 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 155373-56:
(8*1)+(7*5)+(6*5)+(5*3)+(4*7)+(3*3)+(2*5)+(1*6)=141
141 % 10 = 1
So 155373-56-1 is a valid CAS Registry Number.

155373-56-1Relevant articles and documents

Ruthenium-complex-catalyzed N-(Cyclo)alkylation of aromatic amines with diols. Selective synthesis of N-(ω-hydroxyalkyl)anilines of type PhNH(CH2)(n)OH and of some bioactive arylpiperazines

Abbenhuis,Boersma,Van Koten

, p. 4282 - 4290 (1998)

A new class of well-defined neutral mono-, and dicationic ruthenium(II) complexes containing a neutral terdentate donor system [C5H3N(CH2E)2- 2,6] (E = PPh2 (PNP) or NME2 (NN'N) has been found effective as catalyst precursor in N-(cyclo)alkylation reactions of aromatic amines with diols Y(CH2CH2OH)2 (Y = CH2, NR). With these catalysts, N-phenylpiperidine is synthesized from aniline and 1,5-pentanediol in 85% yield (at 180 °C for 24 h in 1.4-dioxane). With neutral RuCl2(NN'N)-(PPh3) as a catalyst precursor, aniline can be selectively N-monoalkylated with diols of the type HO(CH2)(n)OH (n = 4-6, 10) to give N-(n-hydroxyalkyl)anilines in 40-75 yield. To our knowledge, this represents the first useful catalytic route to this type of compounds. The new catalysts can also be used in the synthesis of arylpiperazines. For example, N-phenyl-N'-methylpiperazine is obtained from aniline and MeN(CH2CH2OH)2 in yields up to 34%. N- [m(Trifluoromethyl)phenyl]-N'-methylpiperazine, TFMPMP, is successfully produced from m-(trifluoromethyl)aniline and MeN-(CH2CH2OH)2 in 44% yield using monocationic [RuOTf(NN'N)(PPh3)]OTf as the catalyst precursor. A mechanism for the N-(cyclo)alkylation reaction is proposed.

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