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28165-91-5

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28165-91-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28165-91-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,1,6 and 5 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 28165-91:
(7*2)+(6*8)+(5*1)+(4*6)+(3*5)+(2*9)+(1*1)=125
125 % 10 = 5
So 28165-91-5 is a valid CAS Registry Number.

28165-91-5Downstream Products

28165-91-5Relevant academic research and scientific papers

Synthesis of 3-Alkylcatechols via Intramolecular Cyclization

Miyakoshi, Tetsuo,Togashi, Hiroyasu

, p. 407 - 410 (2007/10/02)

The intramolecular cyclization of 2-alkanoyl-2,5-dimethoxytetrahydrofurans 4 with aqueous acid is described. 3-Alkylcatechols 7 were prepared in generally good yields by boiling the dioxane solution of compounds 4 in the presence of 1 M hydrochloric acid.In addition, 4,5-dioxoalkanals 6 were obtained in good to high yields when the dioxane solution of compounds 4 was treated with 0.1 M hydrochloric acid.

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