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Reduction of Geminal Dihalocyclopropanes with Lithium 4,4′‐Di‐ tert ‐butylbiphenyl; Cyclopropyl Derivatives of Dilithiomethane and 1,2‐Dilithioethane; Inferences Regarding the Intermediate Carbenoids
Author(s) -
Vlaar Cornelis P.,
Klumpp Gerhard W.
Publication year - 1993
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.199305741
Subject(s) - geminal , lithium (medication) , medicinal chemistry , derivative (finance) , chemistry , reduction (mathematics) , psychology , psychiatry , mathematics , economics , geometry , financial economics
The reaction of 7,7‐dihalonorcaranes with lithium 4,4′‐di‐ tert ‐butylbiphenyl at −80 °C leads to mixtures containing primarily 7,7′‐dilithiobinorcarane ( 3 ) besides 7‐lithionorcarane ( 1 ) and 7,7′‐dilithionorcarane ( 2 ). Compound 3 , a derivative of cyclopropylmethyllithium, is remarkable stable.