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643744-76-7

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643744-76-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 643744-76-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,3,7,4 and 4 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 643744-76:
(8*6)+(7*4)+(6*3)+(5*7)+(4*4)+(3*4)+(2*7)+(1*6)=177
177 % 10 = 7
So 643744-76-7 is a valid CAS Registry Number.

643744-76-7Relevant academic research and scientific papers

A new strategy for the synthesis of (±)-Lupinine and (±)-epilupinine via cyclization of α-sulfinyl carbanions

Pohmakotr, Manat,Seubsai, Anusorn,Numeechai, Pornthep,Tuchinda, Patoomratana

, p. 1733 - 1736 (2008/12/22)

(±)-Lupinine and (±)-epilupinine have been prepared starting from commercially available δ-valerolactam. The synthetic route involves the advantages of the cyclization based on α-sulfmyl carbanions.

A general synthetic route to 1-azabicyclo[m.n.0]alkenes via cyclisation based on α-sulfinyl carbanions

Pohmakotr, Manat,Numechai, Pornthep,Prateeptongkum, Saisuree,Tuchinda, Patoomratana,Reutrakul, Vichai

, p. 3495 - 3497 (2007/10/03)

A general synthetic route to 1-azabicyclo[m.n.0]alkenes via cyclisation based on α-sulfinyl carbanions was presented. The intramolecular nucleophillic addition of α-sulfinyl carbanions afforded 1-azabicyclo[m.n.0]alkenes in good yields. It is reported that the developed strategy should provide a general solution for the synthesis of various classes of 1-azabicyclic alkaloids.

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