SOLID PHASE SYNTHESIS OF HETEROCYCLIC COMPOUNDS

摘要

Here we report a study on a reaction sequence on solid phase, suitable for the generation of molecular diversity on small heterocycles. For each reaction, suitable conditions on solid phase were worked out and a variety of reactive agents (building blocks) was utilized in an effort to grasp the system's breadth of applicability. The inventive reaction sequence can be applied, for example, to exploit by the combinatorial approaches of the split and mix concept. The reaction sequence comprises the following steps: a) a solid carrier having reactive surface groups is loaded directly or via a spacer group with a compound bearing an aldehyde or a methylketon function, b) said function is modified using the Witting reaction or the aldol condensation, c) the heterocyclic ring is closed using a compound comprising two nucleophiles, wherein at least one of the said nucleophiles is NH2.