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817196-20-6

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817196-20-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 817196-20-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,1,7,1,9 and 6 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 817196-20:
(8*8)+(7*1)+(6*7)+(5*1)+(4*9)+(3*6)+(2*2)+(1*0)=176
176 % 10 = 6
So 817196-20-6 is a valid CAS Registry Number.

817196-20-6Relevant articles and documents

Synthesis and characterization of enantiomerically pure cis- and trans-3-fluoro-2,4-dioxa-7-aza-3-phosphadecalin 3-oxides as acetylcholine mimetics and inhibitors of acetylcholinesterase

Waechter, Michael,Rueedi, Peter

scheme or table, p. 716 - 736 (2012/06/16)

The title compounds, the P(3)-axially and P(3)-equatorially substituted cis- and trans-configured 7-benzyl-3-fluoro-2,4-dioxa-7-aza-3-phosphadecalin 3-oxides (=7-benzyl-3-fluoro-2,4-dioxa-7-aza-3-phosphabicyclo[4.4.0]decane 3-oxides=5-benzyl-2-fluorohexahydro-4H-1,3,2-dioxaphosphorino[5,4-b]pyridine 2-oxides) were prepared (ee>99%) and fully characterized (Schemes 2 and 4). The absolute configurations were established from that of their precursors, the enantiomerically pure cis- and trans-1-benzyl-3-hydroxypiperidine-2-methanols which were unambiguously assigned. Being configuratively fixed and conformationally constrained phosphorus analogues of acetylcholine, they mimic rotamers of acetylcholine and are suitable probes for the investigation of molecular interactions with acetylcholinesterase. As determined by kinetic methods, the compounds are irreversible inhibitors of the enzyme displaying significant stereoselectivity. Copyright

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