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95207-56-0

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95207-56-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 95207-56-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,5,2,0 and 7 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 95207-56:
(7*9)+(6*5)+(5*2)+(4*0)+(3*7)+(2*5)+(1*6)=140
140 % 10 = 0
So 95207-56-0 is a valid CAS Registry Number.

95207-56-0Relevant articles and documents

Furan Derivatives. Part 10. Synthesis of Cycloheptabenzofuran

Horaguchi, Takaaki,Hasegawa, Eietsu,Shimizu, Takahachi,Tanemura, Kiyoshi,Suzuki, Tsuneo

, p. 365 - 369 (2007/10/02)

Cycloheptabenzofuran 2 was synthesized by heating (5-oxo-5H-benzocyclohepten-4-yloxy)acetic acid 16 with sodium acetate in acetic anhydride or by photocyclization of 16 in acetonitrile.Several reactions of cycloheptabenzofuran 2 were examined.Protonation of 2 with trifluoroacetic acid occurred at the 2-position to give a tropylium ion 17.Catalytic hydrogenation of 2 with palladium on charcoal proceeded smoothly to give tetrahydrocycloheptabenzofuran 18.The Diels-Alder reaction of 2 with tetracyanoethylene produced an adduct 19.Formylation of 2 with phosphorus oxychloride and dimethylformamide occurred easily at the 2-position to afford compound 20.Cycloheptabenzofuran 2 has both properties of heptafulvene and benzofuran.

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