Cas 643741-20-2,(2S,4S,5R,6R)-4-Acetoxy-5-acetylamino-2-methylsulfanyl-6-((1S,2R)-1,2,3-triacetoxy-propyl)-tetrahydro-pyran-2-carboxylic acid 2-nitro-benzyl ester

643741-20-2

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Basic information

Product Name: (2S,4S,5R,6R)-4-Acetoxy-5-acetylamino-2-methylsulfanyl-6-((1S,2R)-1,2,3-triacetoxy-propyl)-tetrahydro-pyran-2-carboxylic acid 2-nitro-benzyl ester
Synonyms: (2S,4S,5R,6R)-4-Acetoxy-5-acetylamino-2-methylsulfanyl-6-((1S,2R)-1,2,3-triacetoxy-propyl)-tetrahydro-pyran-2-carboxylic acid 2-nitro-benzyl ester
CAS NO:643741-20-2
Molecular Formula:
Molecular Weight: 642.638
EINECS: N/A
Product Categories: N/A

Chemical Properties

Melting Point: N/A
Boiling Point: N/A
Flash Point: N/A
Appearance: N/A
Density: N/A
Refractive Index: N/A
Storage Temp.: N/A
Solubility: N/A
CAS DataBase Reference: (2S,4S,5R,6R)-4-Acetoxy-5-acetylamino-2-methylsulfanyl-6-((1S,2R)-1,2,3-triacetoxy-propyl)-tetrahydro-pyran-2-carboxylic acid 2-nitro-benzyl ester(CAS DataBase Reference)
NIST Chemistry Reference: (2S,4S,5R,6R)-4-Acetoxy-5-acetylamino-2-methylsulfanyl-6-((1S,2R)-1,2,3-triacetoxy-propyl)-tetrahydro-pyran-2-carboxylic acid 2-nitro-benzyl ester(643741-20-2)
EPA Substance Registry System: (2S,4S,5R,6R)-4-Acetoxy-5-acetylamino-2-methylsulfanyl-6-((1S,2R)-1,2,3-triacetoxy-propyl)-tetrahydro-pyran-2-carboxylic acid 2-nitro-benzyl ester(643741-20-2)

Safety Data

Hazard Codes: N/A
Statements: N/A
Safety Statements: N/A
WGK Germany:
RTECS:
HazardClass: N/A
PackingGroup: N/A
Hazardous Substances Data: 643741-20-2(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 643741-20-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,3,7,4 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 643741-20:
(8*6)+(7*4)+(6*3)+(5*7)+(4*4)+(3*1)+(2*2)+(1*0)=152
152 % 10 = 2
So 643741-20-2 is a valid CAS Registry Number.

643741-20-2Upstream product

643741-20-2Downstream Products

643741-20-2Relevant academic research and scientific papers

Preparation of sialyl donors carrying functionalized ester substituents: Effects on the selectivity of glycosylation

Ishiwata, Akihiro,Ito, Yukishige

, p. 1339 - 1343 (2003)

Methylthio sialyl donors having various ester substituents were prepared systematically. Nucleophilic displacement of methyl ester with Ph3SiSH and Cs2C3 followed by in situ alkylation with RX or esterification with R-OH/DCC afforded these compounds in good yields. Glycosylations promoted by NIS-TfOH were examined in order to examine the effect of substituent of the ester portion. When conducted in CH3CN, enhanced α-selectivities were observed for cyanomethyl, 2-cyanoethyl, 2-cyanobenzyl, and 2-nitrobenzyl esters, implying that these substituents are effective enhancing the solvent effect of acetonitrile, possibly by stabilizing the β-oriented nitrilium ion.

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