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91265-68-8

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91265-68-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91265-68-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,2,6 and 5 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 91265-68:
(7*9)+(6*1)+(5*2)+(4*6)+(3*5)+(2*6)+(1*8)=138
138 % 10 = 8
So 91265-68-8 is a valid CAS Registry Number.
InChI:InChI=1/C20H21NO3/c22-15-5-3-12-9-14-13-4-6-16(23)19-20(13,17(12)18(15)24-19)7-8-21(14)10-11-1-2-11/h3-6,11,13-14,19,22H,1-2,7-10H2/t13-,14+,19-,20-/m0/s1

91265-68-8Downstream Products

91265-68-8Relevant articles and documents

A new useful conversion method of naltrexone to 14-deoxynaltrexone

Osa, Yumiko,Ida, Yoshihiro,Yano, Yumiko,Furuhata, Kimio,Nagase, Hiroshi

, p. 271 - 282 (2008/02/10)

A novel synthetic method of 14-deoxynaltrexone (2), a μ-opioid receptor antagonist possessing a new message-structural part of opioid ligands, was established. Naltrexone methyl ether (5) was first converted to its acetal (24), followed by dehydration with thionyl chloride in pyridine to afford 8,14-dehydroderivative (26) of 24. The resulting unsaturated compound (26) was reduced with PtO2 under hydrogen to give saturated compound (27), which was then acid-hydrolyzed to afford the desired 14-deoxynaltrexone (23) (3-O-methyl of 2) without degradation of the naltrexone skeleton. The total yield from naltrexone (1) to 23 was 86%. Finally, 23 was demethylated to give 14-deoxynaltrexone (2) in 85% yield. This method provides a useful reaction route to give various important intermediates as a message part to synthesize selectives ligands for the opioid receptor subtypes.

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