A Nonmetal Approach to α-Heterofunctionalized Carbonyl Derivatives by Formal Reductive XH Insertion
作者:Eric J. Miller、Wei Zhao、Jonathan D. Herr、Alexander T. Radosevich
DOI:10.1002/anie.201205604
日期:2012.10.15
Keeping it organic: A direct synthesis of α‐alkoxy and α‐amino ester derivatives by direct reductive coupling of widely available, stable α‐keto esters and protic pronucleophiles is described (see scheme; X=OR, NR2). The method serves as a convenient nonmetal alternative to XHinsertion by diazo decomposition.
使其保持有机状态:已描述了通过广泛可得的,稳定的α-酮酸酯和质子性亲核试剂的直接还原偶联直接合成α-烷氧基和α-氨基酯衍生物的方法(参见方案; X = OR,NR 2)。该方法可作为重氮分解中XH插入的便捷非金属替代方法。
Antimuscarinic bronchodilators
申请人:Pfizer Inc.
公开号:US05171744A1
公开(公告)日:1992-12-15
Compounds having the formula: ##STR1## wherein X is either (a) a phenyl group optionally substituted by 1 or 2 substituents each independently selected from halo, CF.sub.3, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy and hydroxy, or (b) a thienyl group; and Y is an imidazolyl, pyrazolyl, triazolyl or tetrazolyl group optionally substituted by 1 or 2 substituents each independently selected from halo, CF.sub.3, C.sub.1 -C.sub.4 alkoxy, hydroxy and amino; and pharmaceutically acceptable salts thereof, are antimuscarinic bronchodilators useful in the treatment of chronic obstructive airways disease and asthma.