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138857-33-7

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138857-33-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138857-33-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,8,5 and 7 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138857-33:
(8*1)+(7*3)+(6*8)+(5*8)+(4*5)+(3*7)+(2*3)+(1*3)=167
167 % 10 = 7
So 138857-33-7 is a valid CAS Registry Number.

138857-33-7Downstream Products

138857-33-7Relevant articles and documents

Alkyliron and Alkylcobalt Reagents, IV.- High Superiority of Me4CoLi2 and Me4FeLi2 in Comparison to Me2CuLi and Me4MnLi2 in Cross Coupling Reactions with Vinyl Bromides

Kauffmann, Thomas,Stach, Dirk

, p. 913 - 922 (2007/10/02)

The complexes Me4MLi2 (M = Co, Fe, Mn) and Me2CuLi (prepared in situ, but well-known in isolated form) were treated with a series of vinyl bromides.In nearly all cases Me4CoLi2 and Me4FeLi2 proved to by far the best methylating reagents (high yields, reaction at -78 deg C, short reaction time, no excess of the reagent necessary.These reagents will tolerate a hydroxy or cyano group in the substrate, whereas the classical reagent for methylation of vinyl bromides, Me2CuLi, is strongly inhibited by these groups.With the methylation of hydroxyvinyl bromides a new method was found for the synthesis of allyl alcohols. Key Words: Organocobalt complexes / Organoiron complexes

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