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(2R,3R,4S,5R,6S)-2-(4-Azido-3-chloro-benzyloxymethyl)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

193887-71-7

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193887-71-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 193887-71-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,8,8 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 193887-71:
(8*1)+(7*9)+(6*3)+(5*8)+(4*8)+(3*7)+(2*7)+(1*1)=197
197 % 10 = 7
So 193887-71-7 is a valid CAS Registry Number.

193887-71-7Relevant academic research and scientific papers

4-Azido-3-chlorobenzyl Ether, New Protection for Hydroxy Functions

Egusa, Kenji,Fukase, Koichi,Kusumoto, Shoichi

, p. 675 - 676 (2007/10/03)

The 4-azido-3-chlorobenzyl (Cl-Azb) group was readily introduced to hydroxy functions by the use of a crystalline reagent, 4-azido-3-chlorobenzyl bromide, which was prepared from commercially available 2-chloro-4-methylaniline in two steps. Cl-Azb ethers have improved acid stability as compared to the corresponding parent 4-azidobenzyl (Azb) ether. Cl-Azb ethers were stable to direct 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) oxidation, but were cleaved smoothly by DDQ oxidation after conversion to the corresponding iminophosphorane derivative.

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