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928780-23-8

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928780-23-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 928780-23-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,2,8,7,8 and 0 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 928780-23:
(8*9)+(7*2)+(6*8)+(5*7)+(4*8)+(3*0)+(2*2)+(1*3)=208
208 % 10 = 8
So 928780-23-8 is a valid CAS Registry Number.

928780-23-8Upstream product

928780-23-8Downstream Products

928780-23-8Relevant articles and documents

An efficient and stereoselective dearylation of asarinin and sesamin tetrahydrofurofuran lignans to acuminatolide by methyltrioxorhenium/H 2O2 and UHP systems

Saladino, Raffaele,Fiani, Cinzia,Crestini, Claudia,Argyropoulos, Dimitris S.,Marini, Stefano,Coletta, Massimiliano

, p. 39 - 42 (2007)

The synthesis of stereoisomers of acuminatolide is rare and requires complex and time-consuming multistep procedures. Asarinin (1) and sesamin (2), two diasteromeric tetrahydrofurofuran lignans, are efficiently mono-dearylated by methyltrioxorhenium (MTO, I) and hydrogen peroxide (H2O 2) or urea hydrogen peroxide adduct (UHP) as primary oxidant to give (-)-(7R,8′R,8R)-acuminatolide (3A) and (+)-(7S,8R,8′R)-acuminatolide (3B), respectively, in high yield and diastereoselectivity (de >98%). The oxidation of 1 was also performed with novel heterogeneous catalysts based on the heterogenation of MTO on poly(4-vinylpyridine) and polystyrene resins. In these latter cases 3A was obtained with a different yield and selectivity depending on the physical-chemical properties of the support. Cytotoxic effects of 3A and 3B in mammalian cell lines in vitro are also reported.

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