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171734-72-8

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171734-72-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 171734-72-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,7,3 and 4 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 171734-72:
(8*1)+(7*7)+(6*1)+(5*7)+(4*3)+(3*4)+(2*7)+(1*2)=138
138 % 10 = 8
So 171734-72-8 is a valid CAS Registry Number.

171734-72-8Relevant articles and documents

A palladium-catalyzed intramolecular Heck/Hydrogenation approach towards the synthesis of praziquantel

Williams, Alfred L.,St. Hilaire, Valentine R.

, p. 6712 - 6717 (2017)

Starting from 3-methoxy N-acylpyrazinium salts, a new approach towards the synthesis of the antischistosomal drug praziquantel (PZQ) has been developed. Utilization of a palladium-catalyzed intramolecular Heck reaction to form dehydro-PZQ followed by a Hydrogenation step, in a stepwise or one-pot manner, allowed for the gram scale synthesis of PZQ in 4 or 5 steps and in good overall yields. This methodology proved to be well suited for generating the pyrazino[1,2-a] isoindole and pyrazino[1,2-a] benzazepine analogues of PZQ.

Syntheses of a variety of lamellarin compounds and analogues

-

, (2008/06/13)

The present invention relates to methods for preparing a variety of Lamellarin compounds and analogues via a synthetic intermediate, which methods involved the step of performing an intramolecular cyclization of a compound of Formula (I) to produce compou

Assessment of Double-Barrelled Heck Cyclizations as a Means for Construction of the 14-Phenyl-8,9-dihydro-6H-[1]benzopyrano[4',3':4,5]pyrrolo[2,1-a]isoquinolin-6-one Core Associated with Certain Members of the Lamellarin Class of Marine Natural Product

Banwell, Martin G.,Flynn, Bernard L.,Hockless, David C. R.,Longmore, Robert W.,Rae, A. David

, p. 755 - 766 (2007/10/03)

The 1,2,4-trisubstituted pyrrole (4), which is readily prepared from pyrrole itself, undergoes double-barrelled Heck cyclizations to give, inter alia, compounds (3) and (17) for which crystal structures have been determined. Product (3) constitutes the co

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