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53270-12-5

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53270-12-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53270-12-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,2,7 and 0 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 53270-12:
(7*5)+(6*3)+(5*2)+(4*7)+(3*0)+(2*1)+(1*2)=95
95 % 10 = 5
So 53270-12-5 is a valid CAS Registry Number.

53270-12-5Relevant articles and documents

A practical synthesis of β-D-mannopyranosides

Fuerstner, Alois,Konetzki, Ingo

, p. 5721 - 5724 (1998)

An indirect yet highly efficient protocol for the β-D-mannosylation of sterically hindered alcohols is reported. Trichloroacetimidate 5 is used a key building block which is converted into the desired mannosides 9 via triflates 8 by an ultrasound promoted

Total synthesis and absolute configuration of epicoccamide D, a naturally occurring mannosylated 3-acyltetramic acid

Loscher, Sebastian,Schobert, Rainer

supporting information, p. 10619 - 10624 (2013/08/23)

The endofungal metabolite epicoccamide D was synthesised in eighteen steps and 17 % yield as the first member of the family of natural glycotetramic acids. The modular character of the synthesis opens access also to analogues featuring different sugars and spacers. It comprises several high-yielding key steps. The β-D-mannosyl group was introduced by using an α-D-glucosyl imidate donor with subsequent oxidative-reductive epimerisation at C-2′. The pyrrolidine ring was closed quantitatively by a Lacey-Dieckmann condensation of an N-(β-ketoacyl)-N-methyl alaninate. The resulting 3-[ω-(β-D- mannosyl)octadec-2-enoyl]tetramic acid was hydrogenated in the presence of the rhodium catalyst (R,R)-[Rh(Et-DUPHOS)][BF4] to establish the (7S)-stereocentre. This was possible only after blocking the acyltetramic acid as a BF2-chelate to prevent capture of the metal catalyst. We also assigned the hitherto unknown configuration of the natural product as being 5S,7S by comparison of its 13C NMR spectroscopic and optical rotation data with those of our two synthetic 5S,7R/S-diasteromers. Copyright

Efficient and direct synthesis of saccharidic 1,2-ethylidenes, orthoesters, and glycals from peracetylated sugars via the in situ generation of glycosyl iodides with I2/Et3SiH

Adinolfi, Matteo,Iadonisi, Alfonso,Ravidà, Alessandra,Schiattarella, Marialuisa

, p. 7863 - 7866 (2007/10/03)

Peracetylated sugars can be efficiently converted into the corresponding 1,2-ethylidenes, -orthoesters, and -glycals via the in situ generation of glycosyl iodides promoted by I2/Et3SiH. The approach is straightforward and avoids isolation of the sensitive iodinated intermediates.

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