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175521-78-5

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175521-78-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 175521-78-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,5,5,2 and 1 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 175521-78:
(8*1)+(7*7)+(6*5)+(5*5)+(4*2)+(3*1)+(2*7)+(1*8)=145
145 % 10 = 5
So 175521-78-5 is a valid CAS Registry Number.

175521-78-5Relevant articles and documents

Decarboxylative Mannich Reactions with Substituted Malonic Acid Half-Oxyesters

Xavier, Tania,Condon, Sylvie,Pichon, Christophe,Le Gall, Erwan,Presset, Marc

, p. 5452 - 5462 (2021/05/07)

The decarboxylative Mannich reaction between imines and substituted malonic acids half-oxyesters (SMAHOs) has been developed using 1,4-diazabicyclo[2.2.2]octane (DABCO) as an organocatalyst. The reaction proceeds under simple reaction conditions and toler

Hydrogen-Bonding Assisted Catalytic Kinetic Resolution of Acyclic β-Hydroxy Amides

Porey, Arka,Mondal, Bhaskar Deb,Guin, Joyram

supporting information, p. 8786 - 8791 (2021/03/17)

Enantioenriched acyclic α-substituted β-hydroxy amides are valuable compounds in chemical, material and medicinal sciences, but their enantioselective synthesis remains challenging. A catalytic kinetic resolution (KR) of such amides with selectivity factor(s) up to >200 is developed via enantioselective acylation of primary alcohol with N-heterocyclic carbene. An enhanced selectivity for the catalytic KR process is realized using cyclic tertiary amine as base additive. Diastereomeric transition state models for the process are proposed to rationalize the origin of enantioselectivity.

Enantioselective α-Amination of Acyclic 1,3-Dicarbonyls Catalyzed by N-Heterocyclic Carbene

Santra, Surojit,Maji, Ujjwal,Guin, Joyram

supporting information, p. 468 - 473 (2020/02/04)

Herein, we describe a method for the catalytic enantioselective α-amination of α-substituted acyclic 1,3-ketoamides and 1,3-amidoesters that affords the products possessing N-substituted quaternary stereocenters with a chiral N-heterocyclic carbene (NHC). The reaction is based on the utilization of an intrinsic Br?nsted base characteristic of NHC that enables the catalytic formation of a chiral ion pair comprising the enolate and the azolium ion. A series of challenging open-chain α-substituted 1,3-dicarbonyls are aminated via this method with ee's of ≤99%.

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