Welcome to LookChem.com Sign In|Join Free

CAS

  • or

6748-86-3

Post Buying Request

6748-86-3 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

6748-86-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6748-86-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,7,4 and 8 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 6748-86:
(6*6)+(5*7)+(4*4)+(3*8)+(2*8)+(1*6)=133
133 % 10 = 3
So 6748-86-3 is a valid CAS Registry Number.

6748-86-3SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name methyl 4,6-O-benzylidene-β-D-galactopyranoside 2,3-di-O-p-toluenesulfonate

1.2 Other means of identification

Product number -
Other names methyl-[O4,O6-((S)-benzylidene)-O2,O3-bis-(toluene-4-sulfonyl)-β-D-galactopyranoside]

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:6748-86-3 SDS

6748-86-3Relevant articles and documents

Evidence of cation-coordination involvement in directing the regioselective di-inversion reaction of vicinal di-sulfonate esters

Hevey, Rachel,Ling, Chang-Chun

, p. 1887 - 1895 (2013/04/23)

Direct evidence has been obtained to confirm the unusual nucleophilic attack of an alkoxide at the S-center of sp3-hybridized sulfonyl esters. The unusual reaction pathway leads to S-O bond scission which is crucial for the regio- and stereoselective conversion of 2,3-di-O-sulfonates of 4,6-O-benzylidene-β-d-galactopyranosides into β-d-idopyranosides. In addition, strong evidence has been provided to clarify the role of the alkali counter-cation in the transformation. The cation is believed to influence the reaction rate via coordination to an oxygen in the sulfonate ester; the presence of a neighboring ring oxygen oriented in a cis-relationship greatly enhances reactivity of the sulfonyl ester.

Stereochemical dependence of the mechanism of deoxygenation, with lithium triethylborohydride, in 4,6-O-benzylidenehexopyranoside p-toluenesulfonates

Baer, Hans H.,Mekarska-Falicki, Miroslawa

, p. 3043 - 3052 (2007/10/02)

Lithium triethylborohydride was shown to react with methyl 4,6-O-benzylidene-α-D-hexopyranoside 2- and 3-tosylates, and 2,3-ditosylates, in the manno, allo, and altro configurational series both by O-S fission (O-desulfonylation) and by C-O fission (C-desulfonyloxylation), to produce carbinol and deoxy functions, respectively.The results were compared with those previously obtained with the corresponding gluco and galacto isomers, and the degree of facility of the cleavage reactions was seen to depend on the position of the sulfonic ester groups and the overall configuration of the molecules.The mechanism of reductive desulfonyloxylation also depended on configuration and was demonstrated to involve intermediary epoxide formation or displacement by internal hydride shift as the principal paths; competing elimination and direct nucleophilic displacement were found to occur in the allo series, whereas reduction accompanied by ring contraction has thus far been encountered only in the conformationally less constrained, cis-fused acetal system of the galacto series.Like the borohydride reagent, lithium aluminum hydride was found to react (though much more slowly) with the altro 2,3-ditosylate by the epoxide-mediated mechanism, although the latter hydride is known to desulfonyloxylate the α-D-gluco-isomer by a different, intramolecular reduction mechanism.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 6748-86-3