Convenient Access to Primary Amines by Employing the Barbier-Type Reaction of N-(Trimethylsilyl)imines Derived from Aromatic and Aliphatic Aldehydes
摘要:
A new versatile preparation of primary amines via benzylation of aromatic and aliphatic aldimines is described. Sonochemical and traditional methods for generation of the reactive intermediates are compared and contrasted. Competitive reactions were analyzed via free energy relationships to support the proposed alkylative mechanism.
Convenient Access to Primary Amines by Employing the Barbier-Type Reaction of N-(Trimethylsilyl)imines Derived from Aromatic and Aliphatic Aldehydes
摘要:
A new versatile preparation of primary amines via benzylation of aromatic and aliphatic aldimines is described. Sonochemical and traditional methods for generation of the reactive intermediates are compared and contrasted. Competitive reactions were analyzed via free energy relationships to support the proposed alkylative mechanism.
Trans-4-methyl-3-imidazoyl pyrrolidine as a potent, highly selective histamine H3 receptor agonist in vivo
作者:Neng-Yang Shih、Robert Aslanian、Andrew T. Lupo、Steve Orlando、John J. Piwinski、Michael J. Green、Ashit K. Ganguly、Robert West、Salvatore Tozzi、William Kreutner、John A. Hey
DOI:10.1016/s0960-894x(98)00020-1
日期:1998.2
discovery of trans-4-methyl-3-imidazoyl pyrrolidine (+/-)-3a as a potent and highly selectiveH3agonist. The pyrroline (+/-)-3a was resolved, and its (+) enantiomer, Sch 50971 [(+)-3a], showed a greater separation of H3 and H1 activities in vivo (H3/H1 ratio >> 330) than (R)-alpha-methylhistamine (+)-1 (H3/H1 ratio = 17), the standard H3agonist.
Thermal reactions of acyloxy and alkoxy carbene complexes with imines: metathesis, acetate rearrangements, and a new route to imino carbene complexes via Peterson type eliminations
作者:Christopher K. Murray、Benjamin P. Warner、Vera Dragisich、William D. Wulff、Robin D. Rogers
DOI:10.1021/om00162a028
日期:1990.12
Synthesis and NMR properties of derivatives of 5,6-dihydroborauracil and 5,6-dihydroborathymine
Novel boron compounds, a series of 4-hydroxy-5,6-dihydroborauracil and 4-hydroxy-5,6-dihydroborathymine derivatives containing various substituents at 3-, 5-and 6-positions, is presented. The spectroscopic properties, along with analyses of NMR-controlled boron compound-alcohol and boron compound-amine interactions, proves the existence of sp(3)-hybridized, stable B, B-bis-methoxy-5,6-dihydroborauracils and pyridine-/n-butylamine-5,6-dihydroborauracils ate-complexes in solution. (C) 2009 Elsevier Inc. All rights reserved.