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90524-35-9

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90524-35-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90524-35-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,5,2 and 4 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 90524-35:
(7*9)+(6*0)+(5*5)+(4*2)+(3*4)+(2*3)+(1*5)=119
119 % 10 = 9
So 90524-35-9 is a valid CAS Registry Number.

90524-35-9Relevant articles and documents

Silicon Polonovski Reaction. Formation and Synthetic Application of α-Siloxy Amines

Tokitoh, Norihiro,Okazaki, Renji

, p. 3291 - 3298 (1987)

A new and versatile synthetic intermediate, α-siloxy amine was prepared in situ by the base-promoted rearrangement of a siloxyammonium salt obtained by treatment of a tertiary amine N-oxide with trialkylsilyl trifluoromethanesulfonate.The best combination of the base and silylating reagent was found to be methyllithium and t-butyldimethylsilyl trifluoromethanesulfonate.The reactions of α-siloxy amines with acyl halides and haloformates gave the corresponding amides and carbamates in moderate to good yields, respectively.Treatment of α-siloxy amines with acetic acid resulted in a direct dealkylation to free secondary amines.Fluoride induced alkylation of α-siloxy amines using alkyl halides as electrophiles leading to tertiary amines was also examined and demonstrated to be a new transalkylation method of amines.

Base-promoted Rearrangement of Siloxyammonium Salts: a New Method of Dealkylation of Tertiary Amines via Their N-Oxides

Okazaki, Renji,Tokitoh, Norihiro

, p. 192 - 193 (2007/10/02)

Siloxyammonium salts prepared from tertiary amine N-oxides and trialkylsilyl trifluoromethanesulphonate undergo rearrangement in the presence of strong bases to give α-siloxyamines, which can be converted into secondary amine derivatives.

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