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170171-42-3

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170171-42-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 170171-42-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,0,1,7 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 170171-42:
(8*1)+(7*7)+(6*0)+(5*1)+(4*7)+(3*1)+(2*4)+(1*2)=103
103 % 10 = 3
So 170171-42-3 is a valid CAS Registry Number.

170171-42-3Downstream Products

170171-42-3Relevant 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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