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17330-25-5

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17330-25-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 17330-25-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,3,3 and 0 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 17330-25:
(7*1)+(6*7)+(5*3)+(4*3)+(3*0)+(2*2)+(1*5)=85
85 % 10 = 5
So 17330-25-5 is a valid CAS Registry Number.

17330-25-5Relevant articles and documents

Cleavage of activated cyclic amines: Unprecedented approach toward 2-substituted cyclobutanones

Baktharaman, Sivaraj,Selvakumar, Sermadurai,Singh, Vinod K.

, p. 4335 - 4338 (2006)

(Chemical Equation Presented) We report, for the first time, ring opening of activated four- to six-membered cyclic amines followed by an intramolecular expansion of cyclopropanol to cyclobutanone via carbocation intermediate. In the case of a N-tosylazir

Robust synthesis of N-sulfonylazetidine building blocks via ring contraction of α-bromo N-sulfonylpyrrolidinones

Kern, Nicolas,Felten, Anne-Sophie,Weibel, Jean-Marc,Pale, Patrick,Blanc, Aurlien

supporting information, p. 6104 - 6107 (2015/01/09)

A simple and robust one-pot nucleophilic addition-ring contraction of α-bromo N-sulfonylpyrrolidinones has been achieved toward α-carbonylated N-sulfonylazetidines. In the presence of potassium carbonate, various nucleophiles, such as alcohols, phenols or anilines, have been efficiently incorporated into the azetidine derivatives. Moreover, the α-bromopyrrolidinone precursors could be selectively obtained in good yields by monobromination of cheap and easily available N-sulfonyl-2-pyrrolidinone derivatives.

TRANSFORMATION OF N-TOSYL-2-(1,3-BUTADIENYL)AZIRIDINE INTO N-TOSYL-2-ETHENYL-3-PYRROLINE.

Fugami, Keigo,Miura, Katsukiyo,Morizawa, Yoshitomi,Oshima, Koichiro,Utimoto, Kiitiro,Nozaki, Hitosi

, p. 3089 - 3098 (2007/10/02)

1,3-Butadienylaziridines or 1,3-butadienylazetidines activated by N-tosyl group smoothly rearrange to vinylpyrroline derivatives or vinylpiperidines in the presence of a catalytic amount of Pd(PPh3)4.Triphenyltin radical induced rearrangement of title compounds is also described.

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