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75409-90-4

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75409-90-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 75409-90-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,4,0 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 75409-90:
(7*7)+(6*5)+(5*4)+(4*0)+(3*9)+(2*9)+(1*0)=144
144 % 10 = 4
So 75409-90-4 is a valid CAS Registry Number.

75409-90-4Relevant articles and documents

Synthesis of Diphenyl Ether Models of Thyroid Hormones. Diphenyl Ethers Linked to the 3-Oxo-2-azabicycloheptane Ring System as Substrates for Conformational Analysis

Mazzocchi, Paul H.,Ammon, Herman L.,Liu, Leslie,Colicelli, Elena,Ravi, Prasad,Burrows, Elizabeth

, p. 4530 - 4536 (2007/10/02)

A series of diphenyl ethers linked to 2-azabicyclooctan-3-ones and 2-azabicycloheptan-3-ones were synthesized as substrates for conformational analysis using the lanthanide shift reagent NMR technique.The materials were prepared by displacement of the exo-6-tosyloxy bicyclic lactam with the corresponding phenoxide which results in formation of the phenyl ether with retention of stereochemistry.This double-inversion process presumably involves anchimeric assistance by the lactam nitrogen.The synthesis and properties of a number of these systems are described.Complete 13C assignments for the series are presented.

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