287-03-6

Upstream product

• 50423-48-8 1,2-di(prop-2-yn-1-yl)benzene 
• 88180-96-5 9a-Bromo-1a-chloro-1a,2,3,8,9,9a-hexahydro-1H-cyclopropa[b]anthracene 
• 50423-49-9 1,2-bis(iodomethyl)benzene 
• 39638-07-8 2,3-naphthoquinodimethane 
• 88180-97-6 1a,2,9,9a-tetrahydro-1H-cyclopropaanthracene 

Relevant academic research and scientific papers

Tricarbonyl-chromium Complexes of Benzannelated Cycloproparenes

Reaction of 1H-cyclopropanaphthalene (1a) or 1H-cycloporpaanthracene (10a) with tris(acetonitrile)tricarbonylchromium affords cyclobutanaphthalenone and cyclobutaanthracenone 2 and 11, respectively.In contrast, the bis-silylated cycloproparenes 1b and 10b undergo complexation at the terminal benzene ring and lead to the arene-tricarbonylchromium complexes 4b and 12, respectively.Desilylation of 4b to 4a is effected by t-BuOK.

254. Synthesis of Cyclopropanthracenes via Trapping of o-Naphthoquinodimethane

Cyclopropanthracenes 1, 1a, 1b are prepared in a 3-step synthesis starting from o-di(iodomethyl)benzene.The key step consists of trapping of o-naphthoquinodimethane (9) with 1,2-di- and tetrahalogenocyclopropenes (3, 3a, 4b).