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91347-87-4

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91347-87-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91347-87-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,3,4 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 91347-87:
(7*9)+(6*1)+(5*3)+(4*4)+(3*7)+(2*8)+(1*7)=144
144 % 10 = 4
So 91347-87-4 is a valid CAS Registry Number.

91347-87-4Downstream Products

91347-87-4Relevant articles and documents

Zirconium-Mediated Cross-Coupling of Terminal Alkynes and Vinyl Bromides: Selective Synthesis of Cyclobutene and 1,3-Diene Derivatives

Barluenga, Jose,Rodriguez, Felix,Alvarez-Rodrigo, Lucia,Fananas, Francisco J.

, p. 101 - 108 (2007/10/03)

A diastereoselective synthesis of 1,3-butadiene or cyclobutene derivatives by a zirconium-mediated reaction of alkenyllithium compounds and vinyl bromides is reported. The key steps involve the generation of zirconocene-alkyne complexes from haloalkenes and subsequent coupling with alkenyl bromides. Thus, formally the process supposes the cross-coupling reaction between a terminal alkyne and an alkenyl bromide. Moreover, the use of butyl vinyl ether instead of vinyl bromide as the unsaturated system allows an alternative access to different 1,3-butadiene regioisomers.

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