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158873-95-1

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158873-95-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 158873-95-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,8,7 and 3 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 158873-95:
(8*1)+(7*5)+(6*8)+(5*8)+(4*7)+(3*3)+(2*9)+(1*5)=191
191 % 10 = 1
So 158873-95-1 is a valid CAS Registry Number.

158873-95-1Downstream Products

158873-95-1Relevant articles and documents

Facile one-pot coupling - Aminovinylation approach to push - Pull chromophores: Alkyne activation by sonogashira coupling

Karpov, Alexei S.,Rominger, Frank,Mueller, Thomas J. J.

, p. 1503 - 1511 (2003)

A straightforward coupling - aminovinylation sequence of terminal alkynes 1, electron-deficient heteroaryl halides 2, and secondary amines 4 furnishes highly solvochromic push-pull chromophores 5 in good yields. Semiempirical calculations (PM3) suggest that the aminovinylation proceeds in a stepwise fashion through a zwitterionic intermediate with a final rate-determining intramolecular protonation. Crucial parameters for the success of the amine addition are the relative LUMO energies and the charge distribution at the Β-alkynyl carbon atom.

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