Dynamic combinatorial chemistry with hydrazones: libraries incorporating heterocyclic and steroidal motifs
作者:Mark G. Simpson、Michael Pittelkow、Stephen P. Watson、Jeremy K. M. Sanders
DOI:10.1039/b917146k
日期:——
We expand the possibilities in hydrazone based dynamic combinatorial chemistry with a series of new building blocks incorporating heterocyclic motifs. The synthetic procedure allows efficient access to building blocks with the general structure (MeO)2CH-Heterocycle-C(O)NHNH2, originating from heterocycles with an amine and an ester functionality. The equilibrium distribution of macrocyclic N-acyl hydrazones formed upon deprotection of the building blocks with TFA in organic solvents is reported. The mixing behaviour of these heterocycle-based building blocks with our cholate-based building blocks is described, particularly the observation of kinetic intermediates that disappear following ‘proof-reading’.
Dynamic combinatorial chemistry with hydrazones: cholate-based building blocks and libraries
作者:Mark G. Simpson、Michael Pittelkow、Stephen P. Watson、Jeremy K. M. Sanders
DOI:10.1039/b917145b
日期:——
We describe an efficient and general strategy for the synthesis of dimethyl acetal functionalised steroidal hydrazides based on the cholic acid skeleton with the aim of using these compounds as building blocks for dynamic combinatorialchemistry. Deprotection of the acetal protected building blocks with TFA leads to formation of libraries containing macrocyclic N-acyl hydrazone oligomers. The isolation