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138918-23-7

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138918-23-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138918-23-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,9,1 and 8 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138918-23:
(8*1)+(7*3)+(6*8)+(5*9)+(4*1)+(3*8)+(2*2)+(1*3)=157
157 % 10 = 7
So 138918-23-7 is a valid CAS Registry Number.

138918-23-7Relevant articles and documents

A convenient synthesis of 4,6-dichloro-5-benzylthiopyrimidine

Thang,Watson,Best,Fam,Keep

, p. 2363 - 2369 (1993)

A practical and convenient two-step synthesis of the title compound 4,6-dichloro-5-benzylthiopyrimidine from 4,6-dihydroxypyrimidine is described.

Herbicidal sulfonylurea derivatives

-

, (2008/06/13)

The invention embraces compounds of formula and salts thereof, wherein:, , X and Y are independently selected from various optionally substituted alkoxy, alkenyloxy, alkynyoxy and phenoxy groups;, W is oxygen or sulfur;, R1 is hydrogen or alkyl;, E is CH or N;, R2 and R3 are independently selected from various halo, alkyl, alkoxy and amino substituents. The compounds of the invention show herbicidal properties particularly for the control of broad leaf plants in grass crops such as wheat. In further embodiments the invention provides processes for the preparation of compounds I, intermediates useful in the preparation of compounds of formula I, compositions containing as active ingredient a compound of formula I and herbicidal and plant growth regulating processes utilizing compounds of formula I.

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