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838906-52-8

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838906-52-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 838906-52-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,3,8,9,0 and 6 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 838906-52:
(8*8)+(7*3)+(6*8)+(5*9)+(4*0)+(3*6)+(2*5)+(1*2)=208
208 % 10 = 8
So 838906-52-8 is a valid CAS Registry Number.

838906-52-8Relevant articles and documents

Oxonium ylide rearrangement of enzymatically desymmetrized glutarates

Skrobo, Benedikt,Deska, Jan

, p. 5998 - 6001 (2013)

The combination of an enzyme-mediated enantioselective desymmetrization of readily available 3-benzyloxyglutarates and subsequent rhodium-catalyzed oxonium ylide rearrangement of their corresponding in situ derived diazo ketones offers a very concise and highly stereoselective access to functionalized tetrahydrofuranone building blocks.

Kirmse–Doyle- and Stevens-Type Rearrangements of Glutarate-Derived Oxonium Ylides

Skrobo, Benedikt,Schl?rer, Nils E.,Neud?rfl, J?rg -M.,Deska, Jan

supporting information, p. 3209 - 3217 (2018/02/09)

A novel chemoenzymatic synthetic cascade enables the preparation of densely decorated tetrahydrofuran building blocks. Here, the lipase-catalyzed desymmetrization of 3-alkoxyglutarates renders highly enantioenriched carboxylic acid intermediates, whose subsequent activation and oxonium ylide rearrangement by means of rhodium or copper complexes furnishes functionalized O-heterocycles with excellent diastereoselectivity. The two-step protocol offers a streamlined and flexible synthesis of tetrahydrofuranones bearing different benzylic, allylic or allenylic side chains with full control over multiple stereogenic centers.

Synthesis of GABOB and GABOB-Based Chiral Units Possessing Distinct Protecting Groups

Ivic, Trpimir,Dokli, Irena,Rimac, Ana,Hamerak, Zdenko

, p. 631 - 638 (2015/10/05)

In addition to the varied biological activity of GABOB (4-amino-3-hydroxybutanoic acid), the structure of its protected derivatives makes them interesting chiral intermediates for the synthesis of more complex compounds. A stereoselective route to GABOB derivatives with three different protecting groups is presented, using anhydride desymmetrization as a chirality-inducing step. Selective removal of the protecting groups gave compounds with a free carboxylic acid or hydroxy group. Removal of all of the protecting groups allowed GABOB to be isolated in good yield and with excellent ee.

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