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62019-90-3

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62019-90-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 62019-90-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,2,0,1 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 62019-90:
(7*6)+(6*2)+(5*0)+(4*1)+(3*9)+(2*9)+(1*0)=103
103 % 10 = 3
So 62019-90-3 is a valid CAS Registry Number.

62019-90-3Downstream Products

62019-90-3Relevant articles and documents

ORGANOCOPPER(I) MEDIATED SYNTHESIS OF 1-ALKENYLSILANES AND 1,3-ALKADIENYLSILANES FROM ETHYNYLSILANES

Westmijze, H.,Kleijn, H.,Vermeer, P.

, p. 317 - 324 (2007/10/02)

Ethynylsilanes (I) are converted into α-silyl substituted (Z)-alkenylcopper(I) compounds (II) by treatment with RCu reagents.The adducts II react with a variety of electrophiles to give the 1-alkenylsilanes RCH=C(E)SiR3' (III: E = H, Cl, Br, I, CN, SnMe3, SMe, Me, H2C=CHCH2).The conversion of I into III (E = H) can also be effected by using homocuprates, R2CuMgCl, and triorganodicuprates, R3Cu2MgCl.The latter reagent should be used when the group R is methyl.An interesting 1,3-diene formation is observed on treating excess of ethynyltrimethylsilane (Ib) with R3Cu2MgCl; this reaction involves addition of intermediary vinylcuprates to unreacted 1-alkynylsilane (Ib).The intermediary 1,3-dienyl adduct (VIIb) reacts with various electrophiles to give 1,3-dienes, RCH=C(SiMe3)CH=C(E)SiMe3 (VIIIb).

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