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245648-23-1

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245648-23-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 245648-23-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,5,6,4 and 8 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 245648-23:
(8*2)+(7*4)+(6*5)+(5*6)+(4*4)+(3*8)+(2*2)+(1*3)=151
151 % 10 = 1
So 245648-23-1 is a valid CAS Registry Number.

245648-23-1Relevant articles and documents

Vinylogous Mannich reactions. Stereoselective formal synthesis of pumiliotoxin 251D

Martin, Stephen F.,Bur, Scott K.

, p. 8905 - 8914 (1999)

A concise synthesis of (-)-3, a known precursor of pumiliotoxin 251D, has been completed using a vinylogous Mannich reaction as a key construction. Silyloxyfuran 10 added to methoxypyrrolidine 20 in the presence of TMS-OTf to give a mixture (4.8:1) of 21 and 22 in 57% yield. Reduction and global deprotection of 21 afforded the bicyclic lactam 23. Raney Nickel mediated extrusion of the hydroxymethyl group from 23 gave (-)-3.

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