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87696-42-2

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87696-42-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87696-42-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,6,9 and 6 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 87696-42:
(7*8)+(6*7)+(5*6)+(4*9)+(3*6)+(2*4)+(1*2)=192
192 % 10 = 2
So 87696-42-2 is a valid CAS Registry Number.

87696-42-2Relevant articles and documents

Studies Dealing with the Aza-Claisen Rearrangement of 2-Allyloxy-Substituted Oxazoles

Padwa, Albert,Cohen, Leslie A.

, p. 399 - 406 (1984)

The scope of the thermal -sigmatropic rearrangement of a number of 2-allyloxy-substituted 4,5-diphenyloxazoles has been examined.These systems undergo a facile aza-Claisen rearrangement to give 3-allyl-substituted 4,5-diphenyl-4-oxazolin-2-ones.In contrast to the thermal results, irradiation of the 2-allyloxy- or benzyloxy-substituted oxazole gave rise to a mixture of 3- and 5-substituted oxazolinones.The photolysis proceeds via C-O bond scission to generate a radical pair which subsequently recombines to produce the mixture of oxazolinones.A series of related oxazoles was prepared in which the heterocyclic ring and the ? bond are connected by an alkoxy side chain.All attempts to induce an intramolecular Diels-Alder reaction failed.The only product that could be obtained corresponds to that derived from an intramolecular ene reaction.The excited-state behavior of several 2- and 5-allyloxy-substituted oxazoles was also studied.The rationale for the difference in thermal and photochemical behavior is discussed.

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