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108949-55-9

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108949-55-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 108949-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,8,9,4 and 9 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 108949-55:
(8*1)+(7*0)+(6*8)+(5*9)+(4*4)+(3*9)+(2*5)+(1*5)=159
159 % 10 = 9
So 108949-55-9 is a valid CAS Registry Number.

108949-55-9Relevant articles and documents

Arylzinc species by microwave assisted Grignard formation-transmetallation sequence: Application in the Negishi coupling

Mutule, Ilga,Suna, Edgars

, p. 11168 - 11176 (2005)

Arylmagnesium species can be efficiently generated from magnesium turnings and aryl chlorides or aryl bromides under dielectric heating conditions. Subsequent microwave assisted transmetallation using ZnCl2-TMEDA afforded the corresponding arylzinc reagents. A sequential microwave assisted arylmagnesium formation-transmetallation-Negishi coupling protocol suitable for automated multiple parallel synthesis has been developed.

Regioselective 1,4-conjugate addition of grignard reagents to nitrodienes in the presence of catalytic amounts of Zn(II) salts

Dhakal, Ramesh C.,Dieter, R. Karl

supporting information, p. 1362 - 1365 (2014/04/03)

Grignard reagents undergo facile regioselective 1,4-conjugate addition to nitrodienes in the presence of catalytic amounts of Zn(II) salts with excellent yields. A wide range of ligands such as alkyl, aryl, heteroaryl, allyl, vinyl, 1-alkynyl, and alkoxy ligands were transferred, while a thiolate ligand afforded 1,6-regioselectivity. The reactions were successfully carried out on δ-alkyl- or aryl-substituted α,β,γ,δ-diunsaturated nitrodiene substrates. Regioselectivity is minimally influenced by temperature or choice of solvent.

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