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103980-94-5

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103980-94-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 103980-94-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,9,8 and 0 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 103980-94:
(8*1)+(7*0)+(6*3)+(5*9)+(4*8)+(3*0)+(2*9)+(1*4)=125
125 % 10 = 5
So 103980-94-5 is a valid CAS Registry Number.

103980-94-5Downstream Products

103980-94-5Relevant articles and documents

Asymmetric Synthesis Catalyzed by Chiral Ferrocenylphosphine-Transition-Metal Complexes. 3. Preparation of Optically Active Allylsilanes by Palladium-Catalyzed Asymmetric Grignard Cross-Coupling

Hayashi, Tamio,Konishi, Mitsuo,Okamoto, Yasuo,Kabeta, Keiji,Kumada, Makoto

, p. 3772 - 3781 (2007/10/02)

Asymmetric cross-coupling of the - or -Grignard reagent with alkenyl bromides in the presence of a chiral ferrocenylphosphine-palladium complex, dichloroethylamine>palladium(II) (PdCl2), as a catalyst, gave optically active allylsilanes which contain an asymmetric carbon atom directly bonded to the silicon atom, e.g., (R)-3-phenyl-3-(trimethylsilyl)propene (3a) (95percent ee), (R,E)-1-phenyl-1-(trimethylsilyl)-2-butene (3b) (85percent ee), (R,Z)-3b (24percent ee), (R,E)-1,3-diphenyl-3- (trimethylsilyl)propene (3c) (95percent ee), (S,E)-1-phenyl-3-(trimethylsilyl)-1-butene (14c) (71percent ee), (S,Z)-14c (59percent ee), (S,E)-1-phenyl-3-(triethylsilyl)-1-butene (16c) (93percent ee), (S,E)-3-(triethylsilyl)-2-pentene (16b) (85percent ee), (S,E,E)-2-(dimethylphenylsilyl)-3,5-heptadiene (15d) (45percent ee), and 1-cyclopentene (21) (37percent ee).The configuration and enantiomeric purity of the allylsilanes were determined with the aid of stereoselective oxidative cleavage of the carbon-silicon bond in optically active alkylsilanes.

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