308086-53-5

Upstream product

• 62-53-3 aniline 
• 1210-35-1 10,11-Dihydro-5H-dibenzo[a,d]cyclohepten-5-one 
• 10541-20-5 Methyl 10,11-dihydro-5-hydroxydibenzo[a,d]cycloheptene-5-carboxylate 
• 1210-34-0 dibenzosuberol 
• 308086-48-8 Methyl 5-amino-10,11-dihydro-5H-dibenzo[a,d]cycloheptene-5-carboxylate 
• 308086-47-7 Methyl 5-azido-10,11-dihydro-5H-dibenzo[a,d]cycloheptene-5-carboxylate 

Relevant academic research and scientific papers

Synthesis of conformationally constrained spirohydantoins with a dibenzo[a,d]heptadiene ring

Conformationally constrained dibenzo[a,d]cycloheptadiene-based spirohydantoins were prepared from dibenzosuberone via the transformation of the α-hydroxy ester to the azido ester, followed by its reduction to the amino ester, and cyclization of the carbomethoxy N,N'-asymmetric ureas, derived from the amino ester with triphosgene and a variety of amines. A novel ring expansion reaction was also observed in the process.