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1240047-86-2

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1240047-86-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1240047-86-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,0,0,4 and 7 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1240047-86:
(9*1)+(8*2)+(7*4)+(6*0)+(5*0)+(4*4)+(3*7)+(2*8)+(1*6)=112
112 % 10 = 2
So 1240047-86-2 is a valid CAS Registry Number.

1240047-86-2Downstream Products

1240047-86-2Relevant articles and documents

Synthesis of tetrasubstituted alkenes by stereo- and regioselective stannyllithiation of diarylacetylenes

Tsuji, Hayato,Ueda, Yasuyuki,Ilies, Laurean,Nakamura, Eiichi

, p. 11854 - 11855 (2010/10/19)

Addition of trimethylstannyllithium to a diarylacetylene takes place exclusively in an anti-fashion to produce a lithio vinylstannane intermediate. The regioselectivity of the addition is controlled by the steric and electronic property of the acetylene and reaches up to >99:1. The two newly formed C-metal bonds can be sequentially and stereospecifically transformed into two new C-C bonds as illustrated by stereoselective synthesis of 4-hydroxytamoxifen and its regioisomer. A tetraarylethene bearing different aryl groups can be synthesized similarly and cyclized to a substituted dibenzo[g,p]chrysene derivative via a palladium-catalyzed arylation reaction.

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