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224949-94-4

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224949-94-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 224949-94-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,4,9,4 and 9 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 224949-94:
(8*2)+(7*2)+(6*4)+(5*9)+(4*4)+(3*9)+(2*9)+(1*4)=164
164 % 10 = 4
So 224949-94-4 is a valid CAS Registry Number.

224949-94-4Downstream Products

224949-94-4Relevant articles and documents

New Lewis-acidic molybdenum(II) and tungsten(II) catalysts for intramolecular carbonyl erie and prins reactions. Reversal of the stereoselectivity of cyclization of citronellal

Kocovsky, Pavel,Ahmed, Ghafoor,Srogl, Jiri,Malkov, Andrei V.,Steele, John

, p. 2765 - 2775 (2007/10/03)

New Mo(II) complexes BnEt3N+[Mo(CO)4ClBr2]- (A) and Mo(CO)5(OTf)2 (B) and their W(II) congeners D and E have been developed as catalysts for the title reactions. Unlike other Lewis acids, the latter catalysts exhibit cis-stereoselectivity in the cyclization of citronellal (1 → 3 with A and 1 → 5 with B). Isotopic labeling allowed formulation of the reaction mechanism, according to which these complexes act as bulky Lewis acids, η1- coordinated to the carbonyl oxygen. The stereochemistry appears to be controlled by the protruding ligand L(p), which dictates the boatlike transition state III. The kinetically formed cis-alkenol 3 can be equilibrated by [Mo(CO)4Br2]2 (C) or ZnCl2 to its trans-epimer 2 via a retro-ene reaction.

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