21863-81-0

Upstream product

• 2700-22-3 Benzylidenemalononitrile 
• 154027-24-4 2-acetoxy-2-methoxy-5,5-dimethyl-Δ³-1,3,4-oxadiazoline 
• 108-86-1 bromobenzene 
• 78-82-0 Isobutyronitrile 
• 109-77-3 malononitrile 

Downstream Products

• 343957-28-8 3-Isopropyl-3-phenyl-oxirane-2,2-dicarbonitrile 
• 75562-69-5 2-Bromo-(2-methyl-1-phenylpropylidene)propanedinitrile 

Relevant academic research and scientific papers

2-Acetoxy-2-methoxy-5,5-dimethyl-Δ3-1,3,4-oxadiazoline and acetoxy(methoxy)carbene

2-Acetoxy-2-methoxy-5,5-dimethyl-Δ3-1,3,4-oxadiazoline undergoes two competitive 1,3-dipolar cycloreversions at 110°C. It loses N2, presumably to afford a short-lived carbonyl ylide that fragments to acetone and acetoxy(methoxy)carbene. It also forms 2-diazopropane and the appropriate mixed anhydride. It is the only currently known source of acetoxy(methoxy)carbene.