Ring Expansion of a 1,2-Diphosphaspiropentane: Formation of a Diphosphamethylenecyclobutane and a 1,4-Diphosphanorbornadiene
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH(1992)
摘要
Besides the expected spiropentane-methylenecyclobutane rearrangement that yields 2, another reaction channel plays a role in the thermolysis of 1: the diradical formed (in both cases) by P-P bond cleavage reacts by attack on the aryl residues, expelling tBu, to form 3.
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