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49639-03-4

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49639-03-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 49639-03-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,9,6,3 and 9 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 49639-03:
(7*4)+(6*9)+(5*6)+(4*3)+(3*9)+(2*0)+(1*3)=154
154 % 10 = 4
So 49639-03-4 is a valid CAS Registry Number.

49639-03-4Relevant articles and documents

A method for the conversion of sulfoximines to sulfones: Application to polymer-bound sulfoximines and to the synthesis of chiral sulfones

Hachtel, Jochen,Gais, Hans-Joachim

, p. 1457 - 1465 (2007/10/03)

Reaction of N-alkyl, N-aryl, and N-H sulfoximines with m- chloroperbenzoic acid cleanly gives the corresponding sulfones in high yield. In the case of the cleavage of N-alkyl and N-arylsulfoximines, formation of the corresponding nitroso compounds as the other reaction product was proven. Starting from enantio- and diastereopure sulfoximines, a number of chiral sulfones, including the axially chiral sulfone 6 and the sulfonyl- functionalized homoallylic alcohol 8, have been prepared. Reaction of the enantiopure sulfoximine 30 with Merrifield resin gave the polymer-bound sulfoximine 32. Oxidative cleavage of 32 afforded the sulfone 16 in high yield. Deprotonation of the sulfoximine resin 32 and reaction of Li-32 with benzaldehyde and propanal furnished the β-hydroxysulfoximine resins 33a and 33b, respectively. Oxidative cleavage of 33a and 33b readily afforded the β- hydroxy sulfones 14a and 14b, respectively.

Regioselective Preparation of Allylic Sulfones by Palladium-Catalyzed Reactions of Allylic Nitro Compounds with Sodium Benzenesulfinate

Ono, Noboru,Hamamoto, Isami,Kawai, Takashi,Kaji, Aritsune,Tamura, Rui,Kakihana, Masato

, p. 405 - 410 (2007/10/02)

Treatment of allylic nitro compounds with sodium benzenesulfinate in the presence of 5 molpercent of Pd(PPh3)4 in N,N-dimethylformamide (DMF) at 20-70 deg C for 1-10 h resulted in the formation of allylic sulfones with predominance of kinetically controll

Chemo-, Regio-, and Diastereoselective Alkylation via Lewis Acid Promoted Substitutions of Sulfones

Trost, Barry M.,Ghadiri, M. Reza

, p. 1098 - 1100 (2007/10/02)

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