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Toluene-4-sulfonic acid (R)-1-[(2S,3R,4S,5S)-3,4-bis-(tert-butyl-dimethyl-silanyloxy)-5-methoxy-tetrahydro-furan-2-yl]-ethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

139639-76-2

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139639-76-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139639-76-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,6,3 and 9 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 139639-76:
(8*1)+(7*3)+(6*9)+(5*6)+(4*3)+(3*9)+(2*7)+(1*6)=172
172 % 10 = 2
So 139639-76-2 is a valid CAS Registry Number.

139639-76-2Downstream Products

139639-76-2Relevant academic research and scientific papers

Syntheses of L-Fucopyranose and Its Homologs with Ring Heteroatoms Other than Oxygen. Sterocontrolled Conversion of the Common D-Arabinofuranoside Intermediate

Takahashi, Shunya,Kuzuhara, Hiroyoshi

, p. 21 - 24 (1992)

L-Fucopyranose and a couple of L-fucosidase inhibitors, 5-deoxy-5-thio-L-fucopyranose and 1,5-dideoxy-1,5-imino-L-fucitol, were prepared from a common pentose intermediate with α-D-arabino configuration.Stereoselectivities on carbon chain elongation of th

Simple syntheses of L-fucopyranose and fucosidase inhibitors utilizing the highly stereoselective methylation of an arabinofuranoside 5-urose derivative

Takahashi, Shunya,Kuzuhara, Hiroyoshi

, p. 607 - 612 (2007/10/03)

The simple syntheses of L-fucopyranose 1 and its three analogues 2-4 are described. A key reaction is a stereocontrolled elongation by one carbon unit at the side chain of an α-D-arabino-pentodialdo-1,4-furanoside 9 with MeMgI-ZnCl2 or Me3Al. Diastereofacial selectivities of more than 92% were achieved.

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