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186758-26-9

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186758-26-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 186758-26-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,6,7,5 and 8 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 186758-26:
(8*1)+(7*8)+(6*6)+(5*7)+(4*5)+(3*8)+(2*2)+(1*6)=189
189 % 10 = 9
So 186758-26-9 is a valid CAS Registry Number.

186758-26-9Relevant articles and documents

Synthesis of taxoids I. Regioselective Lewis acid-mediated ring-opening of aryl orthoacetates

Harada, Naoyuki,Hashiyama, Tomiki,Ozaki, Kunihiko,Yamaguchi, Tetsuo,Ando, Akira,Tsujihara, Kenji

, p. 305 - 318 (2007/10/03)

The reaction of aryl orthoacetates with acetyl bromide readily proceeded regioselectively to afford the desirable aryl bromides in the presence of tin(II) or zinc bromide as a catalyst. The synthesis of some docetaxel derivatives is also described by using this improved process.

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