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140240-08-0

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140240-08-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 140240-08-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,0,2,4 and 0 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 140240-08:
(8*1)+(7*4)+(6*0)+(5*2)+(4*4)+(3*0)+(2*0)+(1*8)=70
70 % 10 = 0
So 140240-08-0 is a valid CAS Registry Number.

140240-08-0Downstream Products

140240-08-0Relevant articles and documents

PROSTANOIDS. LII. (+/-)-7,7-DICHLORO-4β-TRIMETHYLSILYLBICYCLOHEPT-3-EN-6-ONE IN THE SYNTHESIS OF PROSTANOIDS. RACEMIC CARBACYCLIN

Tolstikov, G. A.,Akhmetvaleev, R. R.,Zhurba, V. M.,Vasil'eva, M. S.,Miftakhov, M. S.

, p. 543 - 552 (2007/10/02)

The products from the Prins reaction of formaldehyde and (+/-)-7,7-dichloro-4β-trimethylsilylbicyclohept-3-en-6-one were isolated and characterized.The optimum conditions were found for the production of the isomeric 2β-acetoxy-6,6(7,7)-dichlorobicyclohept-3-en-7(6)-ones and 2β-acetoxymethyl-3α-acetoxy-6,6(7,7)-dichlorobicyclohept-3-en-7(6)-ones and also (1R,2S,5R,6S,10R)-3,3-dichloro-4-oxo-10-hydroxy(acetoxy)-8-oxatricyclo2,5>undecanes, suitable for the subsequent synthesis of modified prostanoids.An effective scheme for the synthesis of (+/-)-carbacyclin was worked out on the basis of the monoacetates of a series of bicycloheptenones through the corresponding 2β-acetoxymethyl-3α-acetoxybicyclooctan-7-ones.

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