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129780-53-6

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129780-53-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129780-53-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,7,8 and 0 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 129780-53:
(8*1)+(7*2)+(6*9)+(5*7)+(4*8)+(3*0)+(2*5)+(1*3)=156
156 % 10 = 6
So 129780-53-6 is a valid CAS Registry Number.

129780-53-6Relevant articles and documents

Palladium-catalyzed: Ortho -halogen-induced deoxygenative approach of alkyl aryl ketones to 2-vinylbenzoic acids

Ram, Shankar,Sharma, Ajay Kumar,Chauhan, Arvind Singh,Das, Pralay

, p. 10674 - 10677 (2020/10/02)

The 2-vinylbenzoic acids have wide applications in the field of polymer chemistry and are key precursors for the synthesis of important bioactive molecules. Herein, an ortho-halogen-induced deoxygenative approach for the generation of 2-vinylbenzoic acids from alkyl aryl ketones by palladium catalysis is discovered and explored. This approach requires no base or stoichiometric additives and can be carried out through a simple one-step process. Furthermore, the present reaction is scalable up to one-gram scale. The commercially available palladium on carbon (5 wt%) was used as a heterogeneous catalyst and showed excellent recyclability (5 times) without significant loss in catalytic activity. Pleasingly, under our optimized conditions, the alpha alkyl substituted 2-iodoacetophenones exhibit good diastereoselectivity and predominantly (E)-2-vinylbenzoic acids were obtained with good to excellent yields.

Stereospecific Formation of 2-benzoic Acids in an Unusual Reaction of Thiophthalides with Aldehydes

Mal, Dipakranjan,Majumdar, Gita,Pal, Ranjan

, p. 1115 - 1116 (2007/10/02)

The reaction of thiophthalides 1 with aldehydes 3 in the presence of lithium tert-butoxide at -60 deg C to 25 deg C results in the stereospecific formation of only trans 2-(alk-1'-enyl)benzoic acids 4 in fairly good yields in one-pot operations.This react

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