Anionic Multisubstituted 1,2-Azaborolyl Ligands: Syntheses, Characterization, and Coordination Chemistry

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• 作者：Xiangdong Fang ; Jalil Assoud
• 刊名：Organometallics
• 出版年：2008
• 出版时间：June 9, 2008
• 年：2008
• 卷：27
• 期：11
• 页码：2408 - 2410
• 全文大小：99K
• 年卷期：v.27,no.11(June 9, 2008)
• ISSN：1520-6041

文摘

Two synthetic methods for the preparation of tri- or tetrasubstituted 1,2-azaborolyls (Ab) are described. Both tri- and tetrasubstituted Ab rings can be conveniently attained via either dilithiation-directed or Cp₂Zr^II-mediated cyclization followed by transmetalation in good yields. In particular, anionic 1,2,4-trimethyl-1,2-azaborolyl and 1,2,3,4-tetramethyl-1,2-azaborolyl, readily prepared through our methods, have been demonstrated as good supporting ancillary ligands in group IV metal complexes.