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104942-78-1

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104942-78-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 104942-78-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,9,4 and 2 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 104942-78:
(8*1)+(7*0)+(6*4)+(5*9)+(4*4)+(3*2)+(2*7)+(1*8)=121
121 % 10 = 1
So 104942-78-1 is a valid CAS Registry Number.

104942-78-1Relevant articles and documents

The Synthesis of Hetero-bridged (3,6)Oxepinophanes

Jenneskens, Leonardus W.,Kostermans, Gerardus B. M.,Brink, Harmannus J. ten,Wolf, Willem H. de,Bickelhaupt, Friedrich

, p. 2119 - 2122 (2007/10/02)

The (3,6)oxepinophanes (8) are the oxepines with the shortest bridge reported so far.They were obtained starting from diethyl furan-3,4-dicarboxylate (3) which, with lithium aluminium hydride, afforded the diol (4); this was converted into the seven-membered siloxanes (5a and b) by reaction with dichlorodimethylsilane or dichlorodimesitylsilane, respectively.By the Prinzbach-Tochtermann sequence, compounds (5) were converted into the oxepinophanes (8) in three steps: Diels-Alder reaction of (5) with dimethyl acetylenedicarboxylate to give the fused 7-oxanobornadienes (6), photochemical transformations of compounds (6) to the fused 7-oxaquadricyclanes (7), and thermal isomerization of compounds (7) to (8).Attempted conversion of (8a) into (11a), a derivative of paracyclophane, was unsuccessful.

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