Ambient temperature zincation of N-Boc pyrrolidine and its solvent dependency

被引:17
作者
Garden, Jennifer A. [1 ]
Kennedy, Alan R. [1 ]
Mulvey, Robert E. [1 ]
Robertson, Stuart D. [1 ]
机构
[1] Univ Strathclyde, Dept Pure & Appl Chem, WestCHEM, Glasgow G1 1XL, Lanark, Scotland
基金
英国工程与自然科学研究理事会;
关键词
DEPROTONATIVE METALATION; REACTIVITY; RECEPTORS; LIGANDS; BASES; RING;
D O I
10.1039/c2cc31793a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Sodium TMP-zincate, [(TMEDA)Na(TMP)(Bu-t)Zn(Bu-t)], can deproto-zincate N-Boc pyrrolidine at ambient temperature in hexane solution, whereas in toluene the captured alpha-carbanion of the heterocycle attacks the solvent setting off a cascade of reactions that ultimately produce a pyrrolidine-substituted enolate.
引用
收藏
页码:5265 / 5267
页数:3
相关论文
共 22 条
[1]   The reactivity of the N-Boc protecting group:: an underrated feature [J].
Agami, C ;
Couty, F .
TETRAHEDRON, 2002, 58 (14) :2701-2724
[2]   The Cambridge Structural Database: a quarter of a million crystal structures and rising [J].
Allen, FH .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 2002, 58 (3 PART 1) :380-388
[3]   Sodium dialkyl-amidozincates: Alkyl or amido bases? An experimental and theoretical case study [J].
Andrikopoulos, PC ;
Armstrong, DR ;
Barley, HRL ;
Clegg, W ;
Dale, SH ;
Hevia, E ;
Honeyman, GW ;
Kennedy, AR ;
Mulvey, RE .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (17) :6184-6185
[4]   Synthetic and Structural Insights into the Zincation of Toluene: Direct Synergic Ring Metallation versus Indirect Nonsynergic Lateral Metallation [J].
Armstrong, David R. ;
Garcia-Alvarez, Joaquin ;
Graham, David V. ;
Honeyman, Gordon W. ;
Hevia, Eva ;
Kennedy, Alan R. ;
Mulvey, Robert E. .
CHEMISTRY-A EUROPEAN JOURNAL, 2009, 15 (15) :3800-3807
[5]   Diamine-Free Lithiation-Trapping of N-Boc Heterocycles using s-BuLi in THF [J].
Barker, Graeme ;
O'Brien, Peter ;
Campos, Kevin R. .
ORGANIC LETTERS, 2010, 12 (18) :4176-4179
[6]  
Beak P., 1989, TETRAHEDRON LETT, V30, P1154
[7]  
Blaquiere N., 2011, PCT Int. Appl., Patent No. 20110076291
[8]   (S)-(-)-5-ethynyl-3-(1-methyl-2-pyrrolidinyl)pyridine Maleate (SIB-1508Y): A novel anti-Parkinsonian agent with selectivity for neuronal nicotinic acetylcholine receptors [J].
Cosford, NDP ;
Bleicher, L ;
Herbaut, A ;
McCallum, JS ;
Vernier, JM ;
Dawson, H ;
Whitten, JP ;
Adams, P ;
ChavezNoriega, L ;
Correa, LD ;
Crona, JH ;
Mahaffy, LS ;
Menzaghi, F ;
Rao, TS ;
Reid, R ;
Sacaan, AI ;
Santori, E ;
Stauderman, KA ;
Whelan, K ;
Lloyd, GK ;
McDonald, IA .
JOURNAL OF MEDICINAL CHEMISTRY, 1996, 39 (17) :3235-3237
[9]  
Dobrev A., 1987, B SOC CHIM FR NOV, V6, P1084
[10]   Neutral zinc, lower-order zincate and higher-order zincate derivatives of pyrrole: synthesis and structural characterisation of zinc complexes with one, two, three or four pyrrolyl ligands [J].
Garden, Jennifer A. ;
Kennedy, Alan R. ;
Mulvey, Robert E. ;
Robertson, Stuart D. .
DALTON TRANSACTIONS, 2011, 40 (44) :11945-11954