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1235765-33-9

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1235765-33-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1235765-33-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,5,7,6 and 5 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1235765-33:
(9*1)+(8*2)+(7*3)+(6*5)+(5*7)+(4*6)+(3*5)+(2*3)+(1*3)=159
159 % 10 = 9
So 1235765-33-9 is a valid CAS Registry Number.

1235765-33-9Downstream Products

1235765-33-9Relevant articles and documents

2,6-Disubstituted and 2,2,6-trisubstituted piperidines from serine: Asymmetric synthesis and further elaboration

Acharya, Hukum P.,Clive, Derrick L. J.

, p. 5223 - 5233 (2010)

(Figure presented) 4-Hydroxy-3,4-dihydro-2H-pyridine-1-carboxylic acid benzyl esters, which are readily prepared from serine and terminal acetylenes, undergo Claisen rearrangement to piperidine derivatives when heated with butyl vinyl ether in the presence of Hg(OAc)2 and Et3N. This route to optically pure piperidines having substituents α to nitrogen is general, and the rearrangement products are versatile intermediates for making a broad range of amines containing a substituted piperidine subunit.

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