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143771-06-6

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143771-06-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143771-06-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,7,7 and 1 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 143771-06:
(8*1)+(7*4)+(6*3)+(5*7)+(4*7)+(3*1)+(2*0)+(1*6)=126
126 % 10 = 6
So 143771-06-6 is a valid CAS Registry Number.

143771-06-6Relevant articles and documents

The synthesis of a novel benzodiazocine via an intramolecular Staudinger/aza-Wittig cyclization

O'Neil, Ian A.,Murray, Clare L.,Potter, Andrew J.,Kalindjian, S. Barret

, p. 3609 - 3610 (1997)

The novel pyrrolobenzodiazocine (1) has been prepared by an intramolecular Staudinger/aza Wittig protocol from the precursor azido aldehyde (2) in a remarkable 93% yield. Aldehyde (2) was prepared by coupling protected homoprolinol with 2-azidobenzoic aci

Synthesis of (-)-(S, S)-clemastine by invertive N → C aryl migration in a lithiated carbamate

Fournier, Anne M.,Brown, Robert A.,Farnaby, William,Miyatake-Ondozabal, Hideki,Clayden, Jonathan

supporting information; experimental part, p. 2222 - 2225 (2010/08/04)

The first enantioselective synthesis of the antihistamine agent clemastine, as its (S,S)-stereoisomer, has been achieved by ether formation between a proline-derived chloroethylpyrrolidine and an enantiomerically enriched tertiary alcohol. The tertiary alcohol was formed from the carbamate derivative of α-methyl-p-chlorobenzyl alcohol by invertive aryl migration on lithiation. The (S,S)-stereochemistry of the product confirms the invertive nature of the rearrangement.

Convenient in situ synthesis of nonracemic N-protected β-amino aldehydes from β-amino acids. Applications in Wittig reactions and heterocycle synthesis

Davies, Simon B.,McKervey, M. Anthony

, p. 1229 - 1232 (2007/10/03)

N-Z-γ-amino alcohols derived from nonracemic β-amino acids are smoothly oxidised by manganese dioxide in acetonitrile to afford aldehydes which can be trapped in situ in Wittig reactions with carbonyl-substituted phosphoranes. The application of this methodology to the synthesis of the alkaloids (S)-(+)-N-BOC-coniine, (S)-(-)-coniceine and a pipecoline precursor is described.

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