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141939-70-0

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141939-70-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 141939-70-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,9,3 and 9 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 141939-70:
(8*1)+(7*4)+(6*1)+(5*9)+(4*3)+(3*9)+(2*7)+(1*0)=140
140 % 10 = 0
So 141939-70-0 is a valid CAS Registry Number.

141939-70-0Relevant articles and documents

AN EFFICIENT SYNTHESIS OF OPTICALLY ACTIVE 4-BENZYLOXY-3-HYDROXY-1-BUTYNE AND ITS CROSS-COUPLING REACTION

Takano, Seiichi,Akiyama, Masashi,Sugihara, Takumichi,Ogasawara, Kunio

, p. 831 - 841 (2007/10/02)

An efficient procedure for the synthesis of optically active 4-benzyloxy-3-hydroxy-1-butyne (12: R=H) has been established starting with optically active tartrate ester.Cross-coupling reaction of the resulted acetylene (12: R=H) with some aromatic halides

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