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1884-29-3

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1884-29-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1884-29-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,8 and 4 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1884-29:
(6*1)+(5*8)+(4*8)+(3*4)+(2*2)+(1*9)=103
103 % 10 = 3
So 1884-29-3 is a valid CAS Registry Number.

1884-29-3Relevant articles and documents

A General Approach to Deboronative Radical Chain Reactions with Pinacol Alkylboronic Esters

André-Joyaux, Emy,Kuzovlev, Andrey,Renaud, Philippe,Tappin, Nicholas D. C.

, p. 13859 - 13864 (2020/06/10)

The generation of carbon-centered radicals from air-sensitive organoboron compounds through nucleohomolytic substitution at boron is a general method to generate non-functionalized and functionalized radicals. Due to their reduced Lewis acidity, alkylboronic pinacol esters are not suitable substrates. We report their in situ conversion into alkylboronic catechol esters by boron-transesterification with a substoichiometric amount of catechol methyl borate combined with an array of radical chain processes. This simple one-pot radical-chain deboronative method enables the conversion of pinacol boronic esters into iodides, bromides, chlorides, and thioethers. The process is also suitable the formation of nitriles and allylated compounds through C?C bond formation using sulfonyl radical traps. The power of combining radical and classical boron chemistry is illustrated with a modular 5-membered ring formation using a combination of three-component coupling and protodeboronative cyclization.

A CONTRIBUTION TO MECHANISM OF ADDITION OF HYDROGEN BROMIDE TO THE α,β-UNSATURATEDSYSTEM OF 3-PHENYL-2-PROPENOIC ACID

Cervinka, Otakar,Kriz, Otomar

, p. 2952 - 2964 (2007/10/02)

Rate of addition of hydrogen bromide to meta- and para-substituted 3-phenyl-2-propenoic acids I was followed by polarography and UV spectroscopy.Rate of protonation either is the overall rate determining step or is at least comparable with the rate of the subsequent nucleophile attack.

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