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[摘要]：28 Synthesis of novel bis-(2,10-dimethyl-4,8-di-t-butyl-12H-6-oxidodibenzo[d,g][1,3,2]dioxaph osphocin -6-yl)2/3/4-substituted Ph / heteroaryl-methanes were accomplished by Pudovic reaction. Addn. of an equimolar quantities of 2,2'-methylene-bis(6-tert-butyl-4-methylphenol) (1) and EtOH to PCl3 afforded cyclic condensation product. This on reaction with resp. aldehydes followed by treatment with phosphorus(III) monochloride of 1, corresponding bisphosphonate intermediates were formed which on subsequent stirring at reflux temp. rearranged from P(III) to P(V) state. |
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