Design and synthesis of macro-heterocycles structurally related to tirofiban
摘要:
Sequences of nine and four steps were designed to yield two tirobifan related macrocycles by SN2 macrocyclization. The cyclic compounds contain the amino acid tyrosine, one insaturation and are either 18- or 20-membered rings. All the reaction conditions are very mild and the overall yields indicate that the results depend a lot on the structure of the targets and on the length of the reaction sequence. (C) 2000 Published by Elsevier Science Ltd.
Design of an organic sequence suitable for the solid phase combinatorial synthesis of libraries of macro-heterocycles
作者:Mahesh Ramaseshan、John W Ellingboe、Yves L Dory、Pierre Deslongchamps
DOI:10.1016/s0040-4039(00)00710-3
日期:2000.6
The solid as well as solution phasesynthesis of two 14-membered macro-heterocycles is reported. The macrocycles are built out of four or three major building blocks and contain serine, a trans alkene and the malonate unit inside the framework. The macrocyclization was an SN2 reaction between a nucleophilic malonate anion and an allylic chloride leaving group. The first macrocycle, an ether, was obtained