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91497-35-7

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91497-35-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91497-35-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,4,9 and 7 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 91497-35:
(7*9)+(6*1)+(5*4)+(4*9)+(3*7)+(2*3)+(1*5)=157
157 % 10 = 7
So 91497-35-7 is a valid CAS Registry Number.

91497-35-7Downstream Products

91497-35-7Relevant articles and documents

120. Stereoselective Ring Opening of Electronically Excited Cyclohexa-2,4-dienones: Cause and Effect

Quikert, Gerhard,Scherer, Stefan,Reichert, Dietmar,Nestler, Hans-Peter,Wennemers, Helma,Ebel, Andreas,Urbahns, Klaus,Wagner, Klaus,Michaelis, Klaus-Peter,Wiech, Gerhard,Prescher, Günter,Bronstert, Bernd,Freitag, Bernd-Jürgen,Wicke, Ilka,Lisch, Dietmar,Belik, Pavel,Crecelius, Thorsten,H?rstermann, Dirk,Zimmermann, Gottfried,Bats, Jan W.,Dürner, Gerd,Rehm, Dieter

, p. 1683 - 1772 (2007/10/03)

The two conformers of a cyclohexa-2,4-dienone with different substituents at C(6) on irradiation are believed to undergo ring opening stereospecifically affording a mixture of two configurationally isomeric diene-ketenes (and descendents thereof). Exceptions are generally found for those dienones with one C and one O substituent or even with two C substituents, if one of them carries a polar group at a site able to interact through space with the ring C=O group. In these cases, only one of the two anticipated diene-ketenes (and descendents thereof) is produced. A thorough investigation of the photochemistry of a series of structurally different cyclohexa-2,4-dienones on analytical as well as on preparative scale extends our mechanistic knowledge of the various routes from diene-ketenes into a variety of compound classes. Novel compound classes accessible to diene-ketenes are seven-membered carbocycles (by intramolecular aldolization of the zwitterion of appropriately substituted, transiently formed diene-(N,O)-ketene acetals) and βlactams (by Staudinger reaction).

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