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108868-37-7

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108868-37-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 108868-37-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,8,8,6 and 8 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 108868-37:
(8*1)+(7*0)+(6*8)+(5*8)+(4*6)+(3*8)+(2*3)+(1*7)=157
157 % 10 = 7
So 108868-37-7 is a valid CAS Registry Number.

108868-37-7Relevant articles and documents

New synthetic method for dehydrotryptophan derivatives. Synthetic studies on indoles and related compounds. XXXIV

Yokoyama,Takahashi,Takashima,Kohno,Kobayashi,Kataoka,Shidori,Murakami

, p. 832 - 838 (2007/10/02)

Dehydrotryptophans (9) having various substituents on the indole ring were synthesized by vinylation of the corresponding indole derivatives (6) with N-acetyldehydroalanine methyl ester (7a) by the use of a stoichiometric amount of palladium salt in aceti

Palladium-Catalyzed Reactions in the Synthesis of 3- and 4-Substituted Indoles. Approaches to Ergot Alkaloids

Harrington, Peter J.,Hegedus, Louis S.

, p. 2658 - 2662 (2007/10/02)

An efficient synthesis of 4-bromo-1-tosylindole (10) based on the Pd(II)-catalyzed cyclization of an o-ethenylaniline p-toluenesulfonamide has been developed.A Pd(0) oxidative addition-olefin insertion-β-hydride elimination cycle converted 10 to a number of 4-substituted 1-tosylindoles.Selective electrophilic substitutions at the 3-position of 10 provided access to the 3-(chloromercurio)- (18) and 3-iodo-1-tosylindoles (22).Transmetalation to palladium and allyl chloride insertion converted 18 to 3-allyl-4-bromo-1-tosylindole (20) which could be cyclized to the benzindoline 21.A Pd(0) oxidative addition-olefin insertion-β-hydride elimination cycle converted the 3-iodo compound 22 to a number of 4-bromo-3-substituted 1-tosylindoles including 24, a potential precursor to optically active tryptophans.

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