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144236-99-7

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144236-99-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 144236-99-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,4,2,3 and 6 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 144236-99:
(8*1)+(7*4)+(6*4)+(5*2)+(4*3)+(3*6)+(2*9)+(1*9)=127
127 % 10 = 7
So 144236-99-7 is a valid CAS Registry Number.

144236-99-7Downstream Products

144236-99-7Relevant articles and documents

An efficient route to N palmitoyl D crythro sphingomyelin and its 13C-labeled derivatives

Dong, Zhengxin,Butcher Jr., Jared A.

, p. 41 - 46 (2007/10/02)

We describe here a practical and efficient route to a homogeneous N palmitoyl D crythro sphingomyelin and its 13C-labeled derivatives. (2S, 3R,4E)-2-Azido-3-(tert-butyldimethylsilyloxy)-4-octadecene-l-ol1 was converted to the sphingosine equivalent 2 by treatment with triphenylphosphine and water. Amine 2 was then coupled with palmitic acid, affording the ceramide derivative 3a. In the following two reactions the phosphorylcholine functional group was generated by using 2-chloro-2-oxo-1,3,2-dioxaphospholane and trimethylamine, respectively. The final deprotection of the secondary hydroxyl group in 5a produced the desired N palmitoyl D crythro sphingomyelin 6a. The overall yield of this five-step synthesis is 43%. The melting point, 213-215°C, the specific rotation, [α]20D - +6.8 (c= 1-3, CH2Cl2MeOH 1:1) and 1H-and 13C-NMR data indicate that the synthetic sphingomyelin is enantiomerically pure. The 13C-labeled derivatives 6b, 6c and 6d were synthesized by employing the same scheme.

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