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129801-09-8

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129801-09-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129801-09-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,8,0 and 1 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 129801-09:
(8*1)+(7*2)+(6*9)+(5*8)+(4*0)+(3*1)+(2*0)+(1*9)=128
128 % 10 = 8
So 129801-09-8 is a valid CAS Registry Number.

129801-09-8Downstream Products

129801-09-8Relevant articles and documents

A Novel Synthesis of Methylenecyclopropane Spiro-Linked with Cycloalkanes via a Cyclization of Allylic Epoxides and Its Application to a Synthesis of Fused 3-Methylfurans

Satoh, Tsuyoshi,Kawase, Yasushi,Yamakawa, Koji

, p. 1129 - 1135 (2007/10/02)

Ring closure of allylic epoxides derived from 1-chloroalkyl phenyl sulfoxides and cyclic ketones with lithium diisopropylamide (LDA) in 3-Exo-Tet mode gave spiro-linked methylenecyclopropanes having a hydroxyl group in good yields.Oxidation of these compounds gave ketones, which were then treated with p-toluenesulfonic acid in 1,4-dioxane or DMSO at 100 deg C to give fused 3-methylfurans in good overall yields.This procedure was applied to a synthesis of menthofuran from 4-methylcyclohexanone.

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