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156947-99-8

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156947-99-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156947-99-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,9,4 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 156947-99:
(8*1)+(7*5)+(6*6)+(5*9)+(4*4)+(3*7)+(2*9)+(1*9)=188
188 % 10 = 8
So 156947-99-8 is a valid CAS Registry Number.

156947-99-8Relevant articles and documents

VINYL ETHER HYDROLYSIS. 30. EFFECT OF β-CARBOXY AND β-CARBOMETHOXY SUBSTITUTION

Kresge, A. J.,Ubysz, D.

, p. 316 - 322 (1994)

Rates of hydrolysis of the vinyl ether functional groups of (Z)- and (E)-β-methoxyacrylic acid and (Z)- and (E)-β-methoxymethacrylic acid and their methyl esters were measured in aqueous perchloric acid solution.Additional rate measurements were also made for one substrate, (Z)-β-methoxymethacrylic acid, in buffer solutions down to pH 7, and a rate profile was constructed.The results show that the β-carboxy and β-carbomethoxy substituents produce strong rate retardations, ranging from 2000- to 25 000-fold, for both Z- and E-isomers in both the acrylic and methacrylic acid series.The rate profile for (Z)-β-methoxymethacrylic acid indicates that ionization of this substrate to the carboxylate ion form raises the rate of hydrolysis by a factor of 240.It is argued that this difference in reactivity of ionized and non-ionized forms of the substrate is due to conjugative and inductive effects of the substituents, rather than β-lactone formation as suggested in an earlier observation of the same phenomenon in a different system.

Isobenzofurans as Synthetic Intermediates: Synthesis and Biological Activity of 8-epi-(–)-Ajudazol B

Adair, Liam,Egan, Ben A.,Pearson, Colin M.,Lopez-Gonzalez, Ricardo,Kuchar, Michal,Mendoza-Mendoza, Artemio,Prunet, Jo?lle,Marquez, Rodolfo

supporting information, p. 6661 - 6672 (2020/10/15)

Ajudazol B is a polyketide secondary metabolite, isolated from the myxobacterium Chondromyces crocatus, that exhibits potent biological activity. Herein, we report a convergent total synthesis of 8-epi-(–)-ajudazol B. The key step is a regio-selective alk

PANTETHEINE DERIVATIVES AND USES THEREOF

-

Paragraph 2121, (2020/06/19)

The present disclosure relates to compounds of Formula (I), (II), or (II'): (I), (II), (II'), and pharmaceutically acceptable salts or solvates thereof. The present disclosure also relates to pharmaceutical compositions comprising the compounds and therapeutic and diagnostic uses of the compounds and pharmaceutical compositions.

Iridium-catalyzed asymmetric hydrogenation of vinyl ethers

Zhu, Ye,Burgess, Kevin

supporting information; experimental part, p. 979 - 983 (2009/05/30)

A carbene-oxazoline catalyst 1 proved to be an effective catalyst for reduction of an enol ether that the literature suggested could not be hydrogenated effectively by P,N-Ir catalysts. Thus, a series of ester and alcohol substrates were hydrogenated using catalyst 1. Good to excellent enantioselectivities and high conversions were obtained.

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