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193333-27-6

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193333-27-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 193333-27-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,3,3 and 3 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 193333-27:
(8*1)+(7*9)+(6*3)+(5*3)+(4*3)+(3*3)+(2*2)+(1*7)=136
136 % 10 = 6
So 193333-27-6 is a valid CAS Registry Number.

193333-27-6Downstream Products

193333-27-6Relevant articles and documents

Asymmetric Synthesis of Organosilicon Compounds Using a C2 Chiral Auxiliary

Kobayashi, Kimiko,Kato, Takayuki,Unno, Masafumi,Masuda, Shinji

, p. 1393 - 1401 (1997)

Optically active silanes were synthesized by a novel asymmetric synthesis which involved the diastereoselective ring-opening reaction of 1,3-dioxa-2-silacycloheptanes bearing a C2 chiral auxiliary with Grignard reagents, followed by a lithium aluminum hydride (LiAlH4) reduction. (R)-Ethylmethylphenylsilane and (R)-methylphenylpropylsilane were derived in 93%ee and 98%ee, respectively. The preparation of the other optical silanes is also described. The maximum rotations of some of them have been determined by 1H NMR and/or capillary GC methods. A mechanism for a diastereoselective ring-opening reaction is proposed based on the stereochemical results.

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