Mono-acylation of piperazine and homopiperazine via ionic immobilization
作者:Wallace Pringle
DOI:10.1016/j.tetlet.2008.06.044
日期:2008.8
A method for the selective mono-acylation of piperazine and homopiperazine has been developed. In a flow system, initially the diamine is ionically immobilized on a sulfonic acid funtionalized silica gel, acylated with an appropriate reagent and finally liberated with ammonic methanol. Examples with high yield and purity are presented.
A Multistep Continuous-Flow System for Rapid On-Demand Synthesis of Receptor Ligands
作者:Trine P. Petersen、Andreas Ritzén、Trond Ulven
DOI:10.1021/ol902101c
日期:2009.11.19
A multistep continuous-flow system for synthesis of receptor ligands by assembly of three variable building blocks in a single unbroken flow is described. The sequence consists of three reactions and two scavenger steps, where a Cbz-protected diamine is reacted with an isocyanate, deprotected, and reacted further with an alkylating agent.