53137-51-2

Upstream product

• 97492-91-6 7-amino-5H-dibenzo[a,c]cycloheptene-6-carbonitrile 
• 812667-11-1 3-(2'-cyano-biphenyl-2-yl)-propionitrile 
• 408308-58-7 3-(2'-cyano-biphenyl-2-yl)-propionic acid 
• 53137-48-7 6-Chlor-5H-dibenzocyclohepten-5-ol 
• 37608-29-0 7,7-dichlorodibenzonorcaradiene 
• 182675-58-7 5-Bromo-6,7-dihydro-5H-dibenzo[a,c]cycloheptene 
• 219-92-1 dibenzocycloheptene 
• 1015-80-1 6,7-dihydro-5H-dibenzo[a,c][7]annulene 
• 85-01-8 phenanthrene 
• 484-17-3 9-Phenanthrol 
• 912328-70-2 1,1-dichloro-1a-methoxymethoxy-1a,9b-dihydro-1H-cyclopropa[l]phenanthrene 
• 912328-69-9 9-(methoxymethoxy)phenanthrene 
• 53137-49-8 6-chloro-5H-dibenzocyclohepten-5-one 
• 182675-59-8 6,7-Dihydro-5H-dibenzo[a,c]cyclohepten-5-ol 

Downstream Products

• 863305-32-2 diphenic acid 
• 84-11-7 9,10-phenanthrenequinone 

Relevant academic research and scientific papers

Application of aryl siloxane cross-coupling to the synthesis of allocolchicinoids

In this communication, we report a new approach to the allocolchicine carbocyclic skeleton based upon an aryl siloxane coupling reaction and a phenanthrol ring expansion. These key steps allow for the selective functionalization of every carbon within the

Excited state carbon acid dissociation and competing photoarrangements of 5H-dibenzo[a,c]cycloheptene derivatives

Structure reactivity studies of excited singlet state carbon acid dissociation and competing formal di-π-methane rearrangement have been carried out to gain more insights on the photochemistry displayed by these compounds. Photolysis in the presence of ethanolamine resulted in stereoselective deprotonation of the pseudo-axial proton. The results show that excited state carbon acid dissociation is a general reaction of dibenzo and dinaphtho cycloheptenes only if photochemical pathways are not competing.