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118949-53-4

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118949-53-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 118949-53-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,9,4 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 118949-53:
(8*1)+(7*1)+(6*8)+(5*9)+(4*4)+(3*9)+(2*5)+(1*3)=164
164 % 10 = 4
So 118949-53-4 is a valid CAS Registry Number.

118949-53-4Upstream product

118949-53-4Relevant academic research and scientific papers

Chemistry of tricarbonyl hemiketals and application of Evans' technology to the total synthesis of the immunosuppressant (-)-FK-506

Jones,Reamer,Desmond,Mills

, p. 2998 - 3017 (2007/10/02)

Details of model studies probing the chemistry of the tricarbonyl region of FK-506 are presented, and their use in designing a successful route to this immunosuppressant is outlined. Application of asymmetric oxazolidinone alkylation/aldol methodology to a convergent, highly flexible synthesis of the C10-C18 fragment and to improvements in the preparation of the C20-C34 segment are also discussed.

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