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181705-70-4

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181705-70-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 181705-70-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,1,7,0 and 5 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 181705-70:
(8*1)+(7*8)+(6*1)+(5*7)+(4*0)+(3*5)+(2*7)+(1*0)=134
134 % 10 = 4
So 181705-70-4 is a valid CAS Registry Number.

181705-70-4Downstream Products

181705-70-4Relevant articles and documents

Lewis acid assisted vinylogous Mannich and Mukaiyama aldol reactions: A route to densely hydroxylated indolizidine alkaloid analogues

Rassu, Gloria,Carta, Paola,Pinna, Luigi,Battistini, Lucia,Zanardi, Franca,Acquotti, Domenico,Casiraghi, Giovanni

, p. 1395 - 1400 (2007/10/03)

The hydroxymethyl-substituted indolizidines 6 and 7, representative members of a ring-B-expanded alexine-australine subclass, are readily accessible by starting with furan-based silyloxydiene 12 and hydroxymethyl hemiaminal 11, through a synthesis sequence involving a scantily exploited vinylogous version of the Mannich reaction. The key iminium electrophilic acceptor 11 is, in turn, available through a vinylogous intermolecular Mukaiyama aldolization process between pyrrole-based silyloxydiene 8 and (S)- glyceraldehyde 9.

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