Synthesis and muscarinic cholinergic receptor affinities of 3-quinuclidinyl .alpha.-(alkoxyalkyl)-.alpha.-aryl-.alpha.-hydroxyacetates
摘要:
Seven analogues of 3-quinuclidinyl benzilate (QNB) in which one phenyl ring was replaced by an alkoxyalkyl moiety were synthesized and their affinities for the muscarinic cholinergic receptor determined. An oxygen in the beta-position of the moiety was not well-tolerated. By contrast, an oxygen in the gamma-position did not change the affinity for the muscarinic receptor. However, when a bromine was placed on the remaining phenyl ring, the affinity was significantly reduced in striking contrast to results obtained on halogenation of QNB.
Indium tribromide: a highly effective catalyst for the addition of trimethylsilyl cyanide to α-hetero-substituted ketones
作者:Marco Bandini、Pier Giorgio Cozzi、Paolo Melchiorre、Achille Umani-Ronchi
DOI:10.1016/s0040-4039(01)00368-9
日期:2001.4
The catalytic addition of trimethylsilyl cyanide (TMSCN) to a large variety of hetero-substituted ketones promoted by anhydrous InBr3 has been studied. The low catalytic loading (0.1-1 mol%) and the mild experimental conditions required represent the key features of this novel catalytic system. (C) 2001 Elsevier Science Ltd. All rights reserved.