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Ring Expansion of a 1,2‐Diphosphaspiropentane: Formation of a Diphosphamethylenecyclobutane and a 1,4‐Diphosphanorbornadiene
Author(s) -
Garot Catherine,
EtemadMoghadam Guita,
Declercq JeanPaul,
Dubourg Antoine,
Koenig Max
Publication year - 1992
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199206251
Subject(s) - diradical , ring (chemistry) , cleavage (geology) , aryl , chemistry , thermal decomposition , bond cleavage , medicinal chemistry , stereochemistry , organic chemistry , materials science , catalysis , physics , nuclear physics , alkyl , fracture (geology) , singlet state , composite material , excited state
Besides the expected spiropentanemethylenecyclobutane rearrangement that yields 2 , another reaction channel plays a role in the thermolysis of 1 : the diradical formed (in both cases) by PP bond cleavage reacts by attack on the aryl residues, expelling t Bu, to form 3 .