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129986-83-0

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129986-83-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129986-83-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,9,8 and 6 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 129986-83:
(8*1)+(7*2)+(6*9)+(5*9)+(4*8)+(3*6)+(2*8)+(1*3)=190
190 % 10 = 0
So 129986-83-0 is a valid CAS Registry Number.

129986-83-0Upstream product

129986-83-0Relevant articles and documents

A New Chromone and Flavone Synthesis and Its Utilization for the Sythesis of Potentially Antitumorigenic Polycyclic Chromones and Flavones

Harvey, Ronald G.,Hahn, Jung-Tai,Bukowska, Maria,Jackson, Henry

, p. 6161 - 6166 (2007/10/02)

A new synthesis of chromones and flavones based on the ortho-directed metalation of methoxymethyl aryl ethers with alkyllithium reagents is described.It entails reaction of the ortho-lithiated intermediates with a conjugated unsaturated aldehyde followed by oxidation of the allylic alcohol product with "periodinane" to yield an ortho-allylic ketone.The latter on heating in acetic acid undergoes loss of the methoxymethyl protecting group and cyclization to a chromanone (or flavanone, if a β-phenyl substituent is present).Dehydrogenation by treatment with pyrrolidinehydrotribromide (PHT) in dimethyl sulfoxide yields the corresponding chromones (or flavones).This synthetic approach appears general in its applicability.It has been applied to the synthesis of a series of polycyclic chromone and flavone compounds containing the naphthalene and pyrene ring systems that hold promise as agents for the chemoprevention of cancer.

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