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Synthesis, Insertion Reactivity, and Transmetalation Reactions of the Lithium Complex [{2‐(6‐R‐Pyr)(Me 3 Si)}CHLi·OEt 2 ] 2 (R = H or Me)
Author(s) -
Chen Xia,
Guan Lingling,
Eisen Moris S.,
Li Haifen,
Tong Hongbo,
Zhang Liping,
Liu Diansheng
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900239
Subject(s) - chemistry , transmetalation , lithium (medication) , pyridine , reactivity (psychology) , diethyl ether , metalation , phosphinidene , ether , stereochemistry , medicinal chemistry , metal , crystal structure , crystallography , organic chemistry , catalysis , medicine , alternative medicine , endocrinology , pathology
Treatment of 6‐R‐2‐(Me 3 SiCH 2 )C 5 H 3 N (R = H or Me) with n BuLi in diethyl ether affords the dimeric lithium complexes [{2‐(6‐R‐Pyr)(Me 3 Si)}CHLi · OEt 2 ] 2 (Pyr = pyridine, C 5 H 3 N) in high yields. In these complexes, the two anionic ligands have different bonding modes. These complexes easily undergo insertion reactions with nitriles to form six‐membered cyclic dimeric complexes in good yields. Further transmetalations of the six‐membered cyclic complexes with CuCl, SnCl 4 , or CoCl 2 allow the formation of new metal complexes that maintain the frameworks of the six‐membered metallacycles. All complexes represented above were fully characterized by methods including single‐crystal X‐ray crystallography. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)