84530-89-2

Upstream product

• 40400-13-3 2-Iodobenzyl bromide 
• 84530-82-5 3,7-dihydroxy-5-methoxy-2,8-dimethyldibenzophosphole 5-oxide 
• 84530-81-4 3,7-diacetoxy-5-methoxy-2,8-dimethyldibenzophosphole 5-oxide 
• 84530-79-0 3,7-diacetoxy-2,8-diacetoxymethyl-5-hydroxydibenzophosphole 5-oxide 
• 84530-80-3 3,7-diacetoxy-2,8-bisacetoxymethyl-5-methoxydibenzophosphole 5-oxide 
• 84530-78-9 3,5,7-triacetoxy-2,8-diacetoxymethyldibenzophosphole 5-oxide 

Relevant academic research and scientific papers

Synthesis of Substituted Dibenzophospholes. Part 1.

Approaches to the synthesis of 4,6-diaryl-5-hydroxydibenzophosphole 5-oxides are described. 3,5,7-Trihydroxydibenzophosphole 5-oxide and several of its O-substituted derivarives were made either from 5-hydroxydibenzophosphole 5-oxide (convenient preparation described) by dinitration, reduction and tetrazotization or from 2,2'-dibromo-4,4'-dimethoxybiphenyl via lithiation and reaction with dichloromorpholinophosphine with subsequent oxidation. 3,5,7-Trihydroxydibenzophosphole 5-oxide could be selectively blocked in the 2,8-positions by methyl groups generated via a Mannich reaction.The bis-2-iodobenzyl ethers of 3,7-dihydroxy-5-methoxydibenzophosphole 5-oxide and of its 2,8-dimethyl derivative were cyclized by photolysis to form 4,6-diaryl derivatives in poor yield.