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57438-81-0

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57438-81-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57438-81-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,4,3 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 57438-81:
(7*5)+(6*7)+(5*4)+(4*3)+(3*8)+(2*8)+(1*1)=150
150 % 10 = 0
So 57438-81-0 is a valid CAS Registry Number.

57438-81-0Relevant articles and documents

Ligand-controlled iridium-catalyzed semihydrogenation of alkynes with ethanol: highly stereoselective synthesis of E- and Z-alkenes

Yang., Jinfei,Wang, Chengniu,Sun, Yufeng,Man, Xuyan,Li, Jinxia,Sun, Fei

supporting information, p. 1903 - 1906 (2019/05/02)

A ligand-controlled iridium-catalyzed semihydrogenation of alkynes to E- and Z-alkenes with ethanol was developed. Effective selectivity control was achieved by ligand regulation. The use of 1,2-bis(diphenylphosphino)ethane (DPPE) and 1,5-cyclooctadiene (COD) was critical for the stereoselective semihydrogenation of alkynes. The general applicability of this procedure was highlighted by the synthesis of more than 40 alkenes, with good stereoselectivities. The value of our approach in practical applications was investigated by studying the effects of pinosylvin and 4,4′-dihydroxystilbene (DHS) on zebrafish as a vertebrate model.

Potential fibrinolytic agents: versatile synthetic route to novel 4 (branched alkyl)benzoic acids via β monosubstituted or β,β disubstituted styrene 4 carboxylic acids

Loeffler,Delorefice

, p. 1170 - 1173 (2007/10/05)

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