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157734-21-9

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157734-21-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157734-21-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,7,3 and 4 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 157734-21:
(8*1)+(7*5)+(6*7)+(5*7)+(4*3)+(3*4)+(2*2)+(1*1)=149
149 % 10 = 9
So 157734-21-9 is a valid CAS Registry Number.

157734-21-9Downstream Products

157734-21-9Relevant articles and documents

Reactions of Diaminosulfoxonium Ylides with Aldehydes. Preparation of Cyclopropyldiaminosulfoxonium Salts

Okuma, Kentaro,Sato, Yasunari,Ohta, Hiroshi,Yokomori, Yoshinobu

, p. 1855 - 1862 (2007/10/02)

The reaction of diaminosulfoxonium ylides with aldehydes gave the corresponding cyclopropyldiaminosulfoxonium salts in good yields when 1,8-diazabicycloundec-7-ene (DBU) was used as a base.These ylides reacted with aldehydes to give the corresponding betaines, which resulted in the formation of vinylsulfoxonium salts.The additional ylides reacted with these salts to afford cyclopropylsulfoxonium salts.The reaction of these salts with potassium hydroxide is also described.

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