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121789-23-9

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121789-23-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121789-23-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,7,8 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121789-23:
(8*1)+(7*2)+(6*1)+(5*7)+(4*8)+(3*9)+(2*2)+(1*3)=129
129 % 10 = 9
So 121789-23-9 is a valid CAS Registry Number.

121789-23-9Relevant articles and documents

Marine Bacteria, I. - Synthesis of Pentabromopseudiline, a Cytotoxic Phenylpyrrole from Alteromonas luteo-violaceus

Laatsch, Hartmut,Pudleiner, Heinz

, p. 863 - 882 (2007/10/02)

A new synthesis of 2,3,4-tribromo-5-(3,5-dibromo-2-hydroxyphenyl)pyrrole (1a, pentabromopseudiline), an antibiotic, enzymeinhibitory and cytotoxic active constituent of the marine bacterium Alteromonas luteo-violaceus, is described.For investigation of structure-activity relationships further 2-phenylpyrroles are investigated.Key step in their synthesis is the Grignard reaction of 2-(1,3-dioxan-2-yl)ethylmagnesium bromide (9d) with benzoyl chlorides yielding γ-phenyl-γ-ketoaldehydes 24, and the Paal-Knorr cyclisation of the latter. - Key Words: Alteromonas luteo-violaceus / Bromopyrrole / Marine bacteria / Pentabromopseudiline

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