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69778-57-0

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69778-57-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 69778-57-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,7,7 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 69778-57:
(7*6)+(6*9)+(5*7)+(4*7)+(3*8)+(2*5)+(1*7)=200
200 % 10 = 0
So 69778-57-0 is a valid CAS Registry Number.

69778-57-0Downstream Products

69778-57-0Relevant articles and documents

Strategies to control alkoxy radical-initiated relay cyclizations for the synthesis of oxygenated tetrahydrofuran motifs

Zhu, Hai,Leung, Joe C. T.,Sammis, Glenn M.

, p. 965 - 979 (2015)

Radical relay cyclizations initiated by alkoxy radicals are a powerful tool for the rapid construction of substituted tetrahydrofurans. The scope of these relay cyclizations has been dramatically increased with the development of two strategies that utilize an oxygen atom in the substrate to accelerate the desired hydrogen atom transfer (HAT) over competing pathways. This has enabled a chemoselective 1,6-HAT over a competing 1,5-HAT. Furthermore, this allows for a chemoselective 1,5-HAT over competing direct cyclizations and β-fragmentations. Oxygen atom incorporation leads to a general increase in cyclization diastereoselectivity over carbon analogues. This chemoselective relay cyclization strategy was utilized in the improved synthesis of the tetrahydrofuran fragment in (-)-amphidinolide K. (Chemical Equation Presented).

Diastereoselective access to trans -2-substituted cyclopentylamines

Joosten, Antoine,Lambert, Emilie,Vasse, Jean-Luc,Szymoniak, Jan

supporting information; experimental part, p. 5128 - 5131 (2011/01/05)

A highly diastereoselective synthesis of trans-2-substituted cyclopentylamines via a tandem hydrozirconation/Lewis acid-mediated cyclization sequence applied to butenyl oxazolidines is described. The method allows an easy preparation of diversely substituted cyclopentylamines which appear to be useful synthetic intermediates. This was further illustrated by the syntheses of (±)-Rodocaine, (±)-trans-pentacin, and enantiomerically enriched trans-cyclopentane-1,2-diamine.

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