99885-91-3

Upstream product

• 1779-49-3 Methyltriphenylphosphonium bromide 
• 71304-25-1 1,7,8,9,11,11-Hexamethyl-4-phenyl-2,4,6-triazatricyclo<5.2.2.0^2,6>undec-8-en-3,5,10-trion 
• 4233-33-4 4-Phenyl-1,2,4-triazolidine-3,5-dione 
• 99885-89-9 1,2,3,4,6,6-hexamethyl-5-methylenecyclohexa-1,3-diene 

Downstream Products

• 100084-59-1 1,7,8,10,12,12-Hexamethyl-11-methylen-4-phenyl-9-oxa-2,4,6-triazatetracyclo<5.3.2.0^2,6.0^8,10>dodecan-3,5-dion 

Relevant academic research and scientific papers

1,2,3,4,5,5-Hexamethyl-6-methylenecyclohexa-1,3-diene and 1,2,3,4,4,5-Hexamethyl-6-methylenebicyclohex-2-ene

The title compounds 3 and 5, respectively, have been synthesized.On treatment of 3 with acids rapid isomerization to 2 takes place.Rearrangement of 5 to homofulvene 4 occurs at 60 deg C within 3 hours.

Rearrangements of 2,3-Diazabicyclooctane Derivatives

The ketones 4a-e have been synthesized and their reactions with methylmagnesium iodide were studied.A mechanism is given for the rearrangement of some magnesium alkoxides to 6,7-diazabicyclooctane derivatives. - Dehydration of the alcohols 12d, 14a; 17a,b,g, and h with trichlorophosphane oxide is accompanied by migration of the group antiperiplanar to the hydroxy function, and thus 6,7-diazabicyclooctane derivatives are formed. - Ketones 4a,c and e give on sensitized irradiation the tricyclooctane derivatives 40a,b and d, respectively, while direct irradiation leads to the bicycloheptane derivatives 42a,b and d, respectively.