Silver-catalyzed spirolactonization: first synthesis of spiroisoindole-γ-methylene-γ-butyrolactones
摘要:
gamma-Acetylenic carboxylic acids are cyclized to spirolactones under mild conditions, in the presence of Ag2CO3 catalyst. The corresponding spiro-5-alkylidene-gamma-butyrolactones were isolated in high yields, and this process constitutes an easy and efficient route to analogous structures of natural products of biological interest. (c) 2008 Elsevier Ltd. All rights reserved.
Access to 3-spiroindolizines containing an isoindole ring through intra-molecular arylation of spiro-<i>N</i>-acyliminium species: a new family of potent farnesyltransferase inhibitors
N-acyliminium precursors. The latter led, in addition to the spiro-6-membered aza-heterocycles, to the formation of scarce spiro-5-membered analogues which show promising inhibitory activities on human farnesyltransferase in the nanomolar range demonstrating improved IC50 values of up to 1.5 nM.
Silver-catalyzed spirolactonization: first synthesis of spiroisoindole-γ-methylene-γ-butyrolactones
作者:Mohamed M. Rammah、Mohamed Othman、Kabula Ciamala、Carsten Strohmann、Mohamed B. Rammah
DOI:10.1016/j.tet.2008.01.137
日期:2008.4
gamma-Acetylenic carboxylic acids are cyclized to spirolactones under mild conditions, in the presence of Ag2CO3 catalyst. The corresponding spiro-5-alkylidene-gamma-butyrolactones were isolated in high yields, and this process constitutes an easy and efficient route to analogous structures of natural products of biological interest. (c) 2008 Elsevier Ltd. All rights reserved.
Halolactonization of g-Acetylenic Acids: Synthesis of Novel Spiroisoindole Halobutyrolactones
作者:Mohamed Othman、Mohamed M. Rammah、Moncef Msaddek、Mohamed B. Rammah