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20414-93-1

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20414-93-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20414-93-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,1 and 4 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20414-93:
(7*2)+(6*0)+(5*4)+(4*1)+(3*4)+(2*9)+(1*3)=71
71 % 10 = 1
So 20414-93-1 is a valid CAS Registry Number.

20414-93-1Relevant articles and documents

Highly Regio- A nd Enantioselective Hydrogenation of Conjugated α-Substituted Dienoic Acids

Liu, Xian,Liu, Song,Wang, Quanjun,Zhou, Gang,Yao, Lin,Ouyang, Qin,Jiang, Ru,Lan, Yu,Chen, Weiping

, p. 3149 - 3154 (2020/04/09)

Highly regio- A nd enantioselective hydrogenation of conjugated α-substituted dienoic acids was realized for the first time using Trifer-Rh complex, providing a straightforward method for the synthesis of chiral α-substituted ?,?′-unsaturated acids. DFT calculations revealed N+H-O hydrogen bonding interaction is formed to stabilize the transition state and the coordination of 4,5-double bond to Rh(III) center would facilitate the reductive elimination process. This hydrogenation provided a gram-scale synthesis of the precursor of sacubitril.

A new 1,5- to 1,11-carbonyl transposition protocol involving ketene dithioacetal chemistry: An efficient polyene synthesis

Asokan,Shukla,Kumar,Ila,Junjappa

, p. 937 - 947 (2007/10/03)

An efficient strategy for alternative 1,5-, 1,7-, 1,9- and 1,11- carbonyl transposition has been developed via 1,2-reductive or alkylative addition to 5,5-bis(methylthio)-2,4-pentadienals 3a-b, 7,7-bis(methylthio)-2,4,6-heptatrienones 5,9,9-bis(methylthio)-2,4,6,8-nonatetraenones 8 and 11,11-bis(methylthio)-2,4,6,8,10-undecapentaenones 11 followed by BF3,Et2O induced methanolysis of the resulting carbinols to the corresponding polyene esters. The synthesis of the novel polyene aldehydes 3a-b, 7a-b, 10b and polyenones 5, 8, 11 precursors has also been described following iterative Vielsmeier-Haack reaction and aldol condensation.

A Novel General Method for the Synthesis of 2-Methyl-Substituted and 2-Unsubstituted Methyl 5-Aryl-2,4-pentadienoates

Myrboh, B.,Asokan, C. V.,Ila, H.,Junjappa, H.

, p. 50 - 51 (2007/10/02)

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