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169128-06-7

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169128-06-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169128-06-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,1,2 and 8 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 169128-06:
(8*1)+(7*6)+(6*9)+(5*1)+(4*2)+(3*8)+(2*0)+(1*6)=147
147 % 10 = 7
So 169128-06-7 is a valid CAS Registry Number.

169128-06-7Downstream Products

169128-06-7Relevant articles and documents

Synthesis of Naturally (MM 47755; X-14881 E) and Non-Naturally Occuring Aromatic Angucyclinones

Krohn, Karsten,Khanbabaee, Karamali,Micheel, Joerg

, p. 1529 - 1538 (2007/10/02)

The Diels-Alder reactions of the naphthoquinones 1-4 with the dienes 5a-7 were investigated.The regioisomeric outcome of the adducts 10a-10g, 16, and 23 is in agreement with theoretical predictions from frontier orbital calculations.The adduct 10a was further converted to the non-natural (e.g. 15) and the adduct 16 to the natural angucyclinones MM 47755 (19a) and X-14881 E (22) by silicon-oxygen exchange and photooxygenation.The addition of naphthoquinones 2 and 4 to dienes 6 and 7 afford the Diels-Alder adducts 16 and 23, respectively, which are valuable intermediates for further transformation into non-aromatic angucyclinones. - Keywords: Angucyclinones / MM 47755 / X-14881 E / Diels-Alder reactions / Silicon-oxygen exchange

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