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1234580-83-6

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1234580-83-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1234580-83-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,4,5,8 and 0 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1234580-83:
(9*1)+(8*2)+(7*3)+(6*4)+(5*5)+(4*8)+(3*0)+(2*8)+(1*3)=146
146 % 10 = 6
So 1234580-83-6 is a valid CAS Registry Number.

1234580-83-6Relevant articles and documents

Decarboxylative benzylations of alkynes and ketones

Torregrosa, Robert R. P.,Ariyarathna, Yamuna,Chattopadhyay, Kalicharan,Tunge, Jon A.

, p. 9280 - 9282 (2010)

Benzyl esters of propiolic and β-keto acids undergo catalytic decarboxylative coupling when treated with appropriate palladium catalysts. Such decarboxylative couplings allow the benzylation of alkynes without the use of strong bases and/or organometallics. This allows the synthesis of sensitive benzylic alkynes that are prone to undergo isomerizations under basic conditions. Additionally, decarboxylation facilitates the site-specific benzylation of diketones and ketoesters under mild, base-free conditions. Ultimately, the methodology described expands our ability to cross-couple medicinally relevant heterocycles.

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