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860438-73-9

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860438-73-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 860438-73-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,6,0,4,3 and 8 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 860438-73:
(8*8)+(7*6)+(6*0)+(5*4)+(4*3)+(3*8)+(2*7)+(1*3)=179
179 % 10 = 9
So 860438-73-9 is a valid CAS Registry Number.

860438-73-9Relevant articles and documents

4-(Phenylsulfonyl)-4-lithiocyclopentene as a nucleophilic 2-pentene-1,5-dial synthetic equivalent. An aziridine-based synthetic approach to (-)-alstonerine

Cox, Paul,Craig, Donald,Ioannidis, Stephanos,Rahn, Volker S.

, p. 4687 - 4690 (2005)

Reaction of 4-lithio-4-(phenylsulfonyl)cyclopentene with an l-tryptophan-derived N-tosylaziridine provides an adduct. Oxidative cleavage of the cyclopentene double bond provides a dialdehyde, which enters into acid-catalysed Pictet-Spengler-type bicyclisation to give a tetracyclic aldehyde. Completely regioselective silyl dienol ether formation followed by completely stereoselective hetero-Diels-Alder reaction with monomeric formaldehyde gives a late-stage intermediate in a planned total synthesis of the macroline-related alkaloid (-)-alstonerine.

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