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19842-18-3

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19842-18-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19842-18-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,8,4 and 2 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 19842-18:
(7*1)+(6*9)+(5*8)+(4*4)+(3*2)+(2*1)+(1*8)=133
133 % 10 = 3
So 19842-18-3 is a valid CAS Registry Number.

19842-18-3Relevant articles and documents

Chiral isoxazolidine-mediated stereoselective umpolung α-phenylation of methyl ketones

Takeda, Norihiko,Furuishi, Mizuki,Nishijima, Yuri,Futaki, Erika,Ueda, Masafumi,Shinada, Tetsuro,Miyata, Okiko

supporting information, p. 8940 - 8943 (2018/12/10)

An effective asymmetric α-phenylation of methyl ketones with triphenylaluminium in the presence of (+)-benzopyranoisoxazolidine has been developed. The reaction proceeds via the in situ formation of a chiral N-alkoxyenamine and the subsequent diastereoselective nucleophilic phenylation to provide α-phenylated products in moderate to good yields, with high enantioselectivities.

1-Benzoyl-3-(arylphyridyl)urea compounds

-

, (2008/06/13)

The present invention is directed to 1-benzoyl-3-(arylpyridyl)urea compounds useful as insecticides.

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