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33689-45-1

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33689-45-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33689-45-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,6,8 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 33689-45:
(7*3)+(6*3)+(5*6)+(4*8)+(3*9)+(2*4)+(1*5)=141
141 % 10 = 1
So 33689-45-1 is a valid CAS Registry Number.

33689-45-1Upstream product

33689-45-1Relevant articles and documents

Friedel-Crafts Reactions of Some Vinyisilanes

Fleming, Ian,Pearce, Andrew

, p. 2485 - 2489 (2007/10/02)

Substituted cyclohexenylsilanes (2), (5), (9), and (13) undergo Friedel-Crafts reactions to give substitution products, site-selectively at the carbon atom carrying the trimethylsilyl group. β-Trimethylsilylstyrene (17) similary gives more substitution in Friedel-Crafts reactions with benzoyl chloride and with phenylacetyl chloride than styrene itself.The syntheses of the silanes are reported, and some limitations of the idea identified.

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