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91653-44-0

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91653-44-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91653-44-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,5 and 3 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 91653-44:
(7*9)+(6*1)+(5*6)+(4*5)+(3*3)+(2*4)+(1*4)=140
140 % 10 = 0
So 91653-44-0 is a valid CAS Registry Number.

91653-44-0Downstream Products

91653-44-0Relevant articles and documents

Synthesis of sulfur-containing morphinane dienes

Berenyi,Sepsi,Gyulai,Szilagyi

, p. 3307 - 3314 (2007/10/03)

6- and 7-thiocyanato derivatives of 6-demethoxythebaine were obtained by nucleophilic substitution and elimination reactions of 14-halogenated codeine tosylate.

CONVERSIONS OF TOSYL AND MESYL DERIVATIVES OF THE MORPHINE GROUP, XXIII. PREPARATION OF NEW 6-SUBSTITUTED-6-DEMETHOXYTHEBAINE DERIVATIVES

Berenyi, Sandor,Makleit, Sandor,Szilagyi, Laszlo

, p. 307 - 312 (2007/10/02)

6-Substituted-6-demethoxythebaine derivatives were obtained as unexpected products in the nucleophilic substitution reactions with chloride and bromide ions of 6-O-tosyl-14-chloro- and bromocodeines, compounds containing a double allylic system.A study of

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