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64694-19-5

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64694-19-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 64694-19-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,6,9 and 4 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 64694-19:
(7*6)+(6*4)+(5*6)+(4*9)+(3*4)+(2*1)+(1*9)=155
155 % 10 = 5
So 64694-19-5 is a valid CAS Registry Number.

64694-19-5Downstream Products

64694-19-5Relevant articles and documents

Ferrocenium complex aided: O-glycosylation of glycosyl halides

Bauer, Eike B.,Talasila, Deva Saroja

, p. 36814 - 36820 (2021/12/02)

A new strategy for the activation of glycosyl halide donors to be utilized in glycosylation reactions is presented, utilizing the ferrocenium (Fc) complexes [FcB(OH)2]SbF6 and FcBF4 as promoters. The scope of the new system has been investigated using glycosyl chloride and glycosyl fluoride donors in combination with common glycosyl acceptors, such as protected glucose. The corresponding glycosylation products were formed in 95 to 10% isolated yields with α/β ratios ranging from 1/1 to β only (2 to 14 h reaction time at room temperature, 40 to 100% ferrocenium promoter load). This journal is

Indolylthio glycosides as effective building blocks for chemical glycosylation

Demchenko, Alexei V.,Shrestha, Ganesh,Panza, Matteo,Singh, Yashapal,Rath, Nigam P.

, p. 15885 - 15894 (2021/01/19)

The S-indolyl (SIn) anomeric moiety was investigated as a new leaving group that can be activated for chemical glycosylation under a variety of conditions including thiophilic and metal-assisted pathways. Understanding of the reaction pathways for the SIn moiety activation was achieved via the extended mechanistic study. Also reported is how the new SIn donors fit into selective activation strategies for oligosaccharide synthesis.

Reagent Controlled Stereoselective Assembly of α-(1,3)-Glucans

Wang, Liming,Overkleeft, Herman S.,van der Marel, Gijsbert A.,Codée, Jeroen D. C.

, p. 1994 - 2003 (2018/10/15)

Pre-activation based glycosylations have become a very powerful tool in the assembly of oligosaccharides and the use of nucleophilic additives allows for the in situ generation of reactive intermediates with tailored reactivity. We here use a glycosylation strategy that is based on the use of per-benzylated imidate building blocks for the fully stereoselective construction of a spacer equipped Aspergillus fumigatus α-1,3-octaglucan. We have used the trimethylsilyl iodide (TMSI)-triphenylphosphine oxide (Ph3P=O) for the stereoselective installation of an azidopropanol spacer and triflic acid (TfOH)-dimethyl formamide (DMF) enabled glycosylations for the coupling reactions with the secondary glucosyl C-3-alcohols. An operationally simple in situ activation coupling procedure is introduced and used for the final glycosylation events towards the octasaccharide.

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