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54445-54-4

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54445-54-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54445-54-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,4,4 and 5 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 54445-54:
(7*5)+(6*4)+(5*4)+(4*4)+(3*5)+(2*5)+(1*4)=124
124 % 10 = 4
So 54445-54-4 is a valid CAS Registry Number.

54445-54-4Relevant articles and documents

DIRHODIUM TETRAACETATE-CATALYZED DECOMPOSITION OF β,γ-UNSATURATED DIAZO KETONES: A NEW ENTRY TO VINYLOGOUS WOLFF REARRANGEMENT

Ceccherelli, Paolo,Curini, Massimo,Marcotullio, Maria Carla,Rosati, Ornelio

, p. 177 - 180 (2007/10/02)

Dirhodium tetraacetate-catalyzed decomposition of the β,γ-unsaturated diazo ketones 1 - 4, in the presence of methanol, leads to γ,δ-unsaturated esters 5 - 8 via zwitterionic intermediates (i.e., d).

Nucleophile-Selective Iodocyclizations: Butyrolactone versus Tetrahydrofuran Formation

Kurth, Mark J.,Beard, Richard L.,Olmstead, Marilyn,Macmillan, James G.

, p. 3712 - 3717 (2007/10/02)

Nucleophile selectivity in the electrophilic cyclization of substrates like 3 has been investigated in the context of efficient chemo- and stereoselective functionalization of 3-hydroxy-2-(2-methylenecyclohexan-1-yl)butyric acids (cf., 6-9) via iodocycliz

Vinylogous Wolff Rearrangement. 4. General Reaction of β,γ-Unsaturated α'-Diazo Ketones

Smith, Amos B.,Toder, Bruce H.,Branca, Stephen J.

, p. 3995 - 4001 (2007/10/02)

The preparation and vinylogous Wolff rearrangement (VWR) of some 21 acyclic and monocyclic β,γ-unsaturated α'-diazo ketones are described.The resulting γ,δ-unsaturated esters are summarized in Tables I-VI.The rearrangement is promoted by CuSO4, Cu(AcAc)2,

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