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305805-80-5

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305805-80-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 305805-80-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,5,8,0 and 5 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 305805-80:
(8*3)+(7*0)+(6*5)+(5*8)+(4*0)+(3*5)+(2*8)+(1*0)=125
125 % 10 = 5
So 305805-80-5 is a valid CAS Registry Number.

305805-80-5Relevant articles and documents

Stereoselective synthesis of (Z)-α-phenoxymethylene-γ-butyrolactone and its sulfur analogues from 2-propynyloxy- or 2-propynylthiobenzene

Luo, Fen-Tair,Ko, Seng-Li,Liu, Lijun,Chen, Hui

, p. 2055 - 2066 (2007/10/03)

The preparations of (Z)-α-phenoxymethylene-γ-butyrolactone, α-phenoxymethyl-γ-butyrolactone, (Z)-α-phenylthiomethylene-γ-butyrolactone, and α-phenylthiomethyl-γ-butyrolactone derivatives from 2-propynyloxy-benzene and 2-propynylthiobenzene were described.

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