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60794-21-0

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60794-21-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 60794-21-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,0,7,9 and 4 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 60794-21:
(7*6)+(6*0)+(5*7)+(4*9)+(3*4)+(2*2)+(1*1)=130
130 % 10 = 0
So 60794-21-0 is a valid CAS Registry Number.

60794-21-0Relevant articles and documents

STEREOSELECTIVE SYNTHESIS OF 3-HYDROXY-2,6-DIALKYLPIPERIDINES

Harding, Kenn E.,Jones, Michael W.

, p. 663 - 668 (2007/10/02)

A new method for stereoselektive synthesis of 3-hydroxy-2,6-dialkylpiperidine alkaloids is reported.The key trans-oxazolidine intermediate 8 was generated by mercuric ion-initiated cyclofunctionalization of an N-acylaminomethyl ether derivative of allylic alcohol 5 (6 -> 7).Racemic deoxocassine (3) was synthesized by addition of a C11 chain (8 -> 9), cleavage of the oxazolidine ring under basic conditions (9 -> 17), and reductive amination to generate the piperidine ring (17 -> 3).It was found that attempts to cleave the cyclohexyl carbamate group of oxazolidine 9 under acidic conditions resulted in rapid rearrangement to oxazolidinone 10 with inversion of stereochemistry at the O-substituted carbon.This oxazolidinone was converted to racemic isodeoxycassine (4) by ring cleavage (10 -> 14) and reductive amination.Treatment of oxazolidine 9 under strongly acidic conditions led to isolation of the 3-acetoxy-2,5-dialkylpiperidine 11, the product of an intramolecular Mannich reaction.

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