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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: batuhan on March 21, 2025, 09:59:07 AM

Title: Naming and Numbering Zaleplon
Post by: batuhan on March 21, 2025, 09:59:07 AM

so i have question about numbering fused ring why did we start with A on intersecting wall instead of B. Wouldnt it be more accurate to start lettering from the Nitrogen at the top

Title: Re: Naming and Numbering Zaleplon
Post by: Hunter2 on March 21, 2025, 11:00:00 AM

IUPAC Name is

N-[3-(3-cyanopyrazolo[1,5-a]pyrimidin-7-yl)phenyl]-N-ethylacetamide
The numbering at a gives lower number, because N-N is the shortest.